I'm not trying to be mean, but most people will say that a "Malti-Poo" is a designer mutt & anyone who breeds them isn't reputable & you should just go to your local shelter & adopt a dog needing a home. However, I think that you might have better luck finding one at a shelter since that's a common cross, and you probably will spend a lot less. Good luck!
I've got a couple of leads from people on this site about some Maltipoo Breeders. We are not allowed to give information on this site, but if you leave you email I'll give you the information I was given.
When I was out like a week ago shopping I saw a man with what he called a malti-poo. It was very very cute. Mostly looked like a poodle to me but probebly had some maltese traits too. I know that both are smart breeds and of coarse small but other than that I dont think you can generalize what you would get in a mix.
I'd hit up dog parks, pet stores and ask when you find one. I've found a few here in California. Don't come down to L.A. and buy from Anna's grooming. she's badddddd. Nor So. Cal puppies. I know someone in Alabama, but that may be too far for you.
For me it's not a pure bred vs. mixed breed thing. my advice to you would be to first make sure that you are fond of BOTH breeds because you don't know how many Maltese traits or how many Poodle traits any one dogs from the pairing with have. I think that is the biggest mistake that folks looking at a mixed breed make.
It's important when you look for a breeder that you look for one that knows what they are talking about concerning BOTH breeds. They should understand the health issues of both breeds and the intricacies of both breeds temperaments.
I also personally prefer puppies raised in the breeders home - but be careful that they aren't raised in an unsafe environment in the breeders home. I'm not fond of breeders who raise puppies in their bathroom, in a kiddie wading pool in their laundry room, in their garage.... I puppy nursery should be something set up specifically to safely raise a litter so that the breeder knows there is no risk of things falling into the "whelping box", and that there is nothing harmful that the puppies should get into.
You also want a puppy that is current on all vaccinations that you vet feels are appropriate (take the time to call and ask your vet what they like to see - because a good breeder usually works closely with a good vet). The puppies dew claws should be removed. The breeder should be willing to give you some kind of guarantee that the puppy will be coming to you parasite free (and they should run a fecal panel on their litters, including a giardia test - puppies with parasites can cost anywhere from $50-200 to get cleared up). You also want at least a 2 year health guarantee. Most defects don't become apparent until after the first year (more commonly between 18 months and 2 years) and if a breeder won't give a 2 year guarantee it shows that they are not confident that they are raising healthy dogs.
Good mixed breed breeders are hard to come by because they almost always are breeding solely to make money and don't have much regard for their dogs, their puppies, or your family. You can find them, they are just rare. They are also usually what I call "novice breeders", meaning that they haven't been breeding long and didn't do a lot of research before they started breeding. A good question to ask is "Why did you decide to breed?" and "Why are you breeding this breed?" If the answer has anything to do with "Because people want Maltipoos" then you are looking at a "money breeder" and not one that is looking at the wellfare of the animals first and foremost. Also ask some specific health questions related to the two breeds - has the breeder seen any luxation in rear knees, any heart problems, ect... in their dogs. Are any of them tested with the OFA?
My biggest beef with mixed breed breeders is that they often charge more for a mixed breed puppy than you would pay for a pure bred, and usually haven't got near the knowledge of breeding or their breeds that a good pure bred breeder would have. It's important that your breeder know their stuff - otherwise you have no idea what corners they cut with your puppy. I also prefer when a mixed breed breeder lets you know up front that what they have is a Maltese/Poodle mix and you aren't getting a true "breed" of dog. A good breeder will share with you the downfalls of adopting a specific breed or mix as well as the perks. (I always make sure I tell my Sheltie families that they are looking at a dog will be vocal so that if they hate dog barking they don't get a sheltie)
And for a mixed breed, a shelter is always a good place to start your search. Often times, mixed breed puppies are dumped at the shelter because their first family didn't know what they were getting into with the specific mix and the breeds weren't a good fit for their families.
Also try puppyfinder.com. Don't forget to ask for references, and make sure they have all their shots. I wouldn't get a puppy till it's 16 weeks with all it's shots. I had the misfortune of getting a puppy at eight weeks with Parvo. It broke my heart and you never get over it. I still miss her.