Thanks all for the wonderful compliments. A couple of sites that have tutorials for these have been posted. They are great sites, pick out the sections that you feel work well for you. Check out the available tutes and send me a pm if you still have specific questions on how I do them.
Mailing: I took my first one that I wanted to mail to my local PO and asked what the postage would be. Obviously I am the first person to ever mail a fabric postcard here. The postage is the current first class letter rate plus the extra fee for non machining cancelation of 20 cents. Current that is 64 cents for me to mail my cards. And they just happen to have 64 cent stamps.