I know a few of you are Kindle users--so, it is worth mentioning that I have joined Lendle. Essentially, it is an e-book lending service. You actually get a small kickback for each loan that adds up into Amazon gift certificates.
You can make "friends" on the site--but it doesn't seem to be terribly useful. It is easier to search for the books you want and borrow them from whoever has them up for grabs. But if you want to be friends on the site then let me know.
Pretty nifty site:
lendle.me