Well, I haven't figured out the pattern part yet, but here are some recommended sites that DO have patterns, plus a forum and blog. First of all:
Heather's Bracelet Forum-A great forum where you can find patterns and talk about anything from bracelets to the latest movie.Heather's Bracelet Blog-It's amazing! She put on quite a few alpha patterns, plus instructions for even more amazing patterns.
friendship-bracelets.net-The best ever! Stefan has 2 generators, and therefore, you can generate your own patterns. If you're looking for seasonal patterns, check out Frosty's patterns: they're AMAZING!
how-to-make-jewelry.com/friendship.bracelets: GREAT patterns; a very reliable site.
One more: Knot-Cool.com: Radical.
I have also added links to the bottom of the page to make the Web surfing a little bit easier on you.