SUCCESS!

My kit showed up yesterday. After registering everything at boost.com I put in the SIM. After a few minutes everything was booted up and the reception showed all capital letters (NXTL). So far everything has worked perfectly. I browsed on Opera for about an hour, setting up bookmarks and things like that.

I checked my email with iMobileMail. I really like it becuase it doesn't actually pull the email out of my mailbox, it only downloads a copy.

I also had a convo on Ramble IM with someone for over an hour.

Overall everything worked perfectly! This is by far the best $37 I've ever spent ($25 for 7520 w/shipping, $12 for Boost Starter Kit w/shipping, both from eBay).