Make your Powerbook into a WiFi Access Point
MAKE: blog has a new how-to up showing you how to turn your Powerbook into a WiFi access point for everyone around you, using an EVDO card and OS X's Internet Sharing features. We here at TUAW are fascinated with EVDO, but alas, our "most reluctant to spend $60 a month on internet access" scrooge of the group, Scott, is the only one with a 15-inch Powerbook and the requisite card slot to allow for EVDO access. Both Laurie and myself are waiting for some sort of non-card slot solution as we're both rocking 12-inch Powerbooks. Jay can pick up WiFi wherever he goes, because he has an iBook (which has the best wireless range of Apple's portables), so it's a non-issue for him.
In any case, check out the rather thorough how-to if you're interested in sharing your EVDO connection with 10 of your closest friends or strangers. Also, the really good news is that you no longer have to hack away to get the EVDO working: the Kyocera KPC650 EVDO Card is now fully supported on any PowerBook with a PC Slot.