As for FaceTime I think you're SOL. As for iMessage, you can just SMS/MMS text and it's well integrated into the Messages app on both my phone and Mac. My messages to you just appear green instead of blue.
I'm assuming you'd like me to reply. That reply will cost money. Checking AT&T they want a extra $10 a month to send 100 International SMS messages or $0.25 a message
