You may want to PM Kiwideus - she also has two congenitally deaf white kitties (I think it's two of them - at least one).
We have a deaf white cat, though as she can hear some frequencies, we think hers is due to a severe herpes infection prior to her rescue (feral kitty rescue), not that she was born deaf.
She's the opposite of Nat's in that she is really good with other cats. She doesn't go out of her way to be nice to new additions or fosters, but no cat has ever disliked her. She's also VERY playful, and she runs and romps around like nuts with our two other playful cats. We rescued her at 7 or 8 weeks old, and she turned 7 this past summer.
Flowerbelle doesn't spook very easily. When we get out the vacuum, the others run - she doesn't notice them running (she also only has one eye) - and if she does, she seems to wonder what the fuss is about.

And while she does have the cutest trills and merps and sounds she makes, I'd have to agree that sometimes she isn't aware of how loud she's being, because she can really belt it out when she wants attention.

She talks with her paw ALL the time. She waves it at us for attention, she pokes it at us to wake us up, she uses it very expressively. She's ambidextrous.

She also LOVES to be very high up. Especially in the corner of a room or up against a far wall. When we noticed this, we made sure to have places for her to go "up" at room edges and corners where possible. I always assumed this was because of her deafness. My theory is that she likes to be able to see all the comings and goings because she can't hear them.
Some with deaf kitties have "stomp" trained them (to call them or say "no" with various stomp combinations). As Flowerbelle can hear certain frequencies, we're able to get her attention with a kind of high-pitched clicking noise.
I'm sure there's a deaf kitty Yahoo group - you may want to look into that.

Flowerbelle talking with her paw:
