I did it and it's NO BIG DEAL. You disconnect the battery and let it sit for 45 minutes, according to my mechanic. No Boom, no airbag light to reset, nothing.
Buy any 3 spoke wheel you can find on Ebay for a boxster or 996 all will work fine. Non tip's go for 150 - 200, Tips are far cheaper... I have a 5 speed and put in a tip due to cost ($81.00)
Airbags will always cost a bunch more...I paid $180 for mine, but the guy had no idea it was worth $250 or more.
When you get your wheel and airbag, PM me for a pictoral of how to remove it... it's a 30 minute job requiring a socket set with an extension and a Torx driver (#10 if I'm not mistaken) that removes two screws in the back of the wheel, releasing the airbag.
The other thing you should do is update that nasty, phallic looking shifter! Buy the one I posted to this site from Ebay that I saw... and scratch off the silver paint with your fingernails and make it look new again:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=7959992159&rd=1&sspagename=STRK%3AMEWA%3AIT
I swear that if this thing goes cheap, I'll buy it myself and make some money on the resale of it... took me nearly five months to find one one Ebay that was selling cheap!