I've caught myself saying cheers, and then doing a double take because that one's still strange to me. But 'ta' slipped into my vocabulary as if it'd always been there. I say it when I'm back home in the States without thinking, and get some very odd looks. Whups. =)

Do you find that you can't remember how to pronounce certain words? My husband and I have argued so much over how "coherent" is pronounced that I now can't actually remember which one was 'mine', I use them both interchangeably. Ditto basil. The h in herb is still silent, though!