Sonnet Tech announced TiBook Upgrade: <http://www.sonnettech.com/service/tibook/index.html> It's limited to 550/667 models with VGA output. I'm on the fence about this upgrade. While it would be nice to double the processor speed of my TiBook, the rest would be the same as it was when I originally bought it in 2001 (i.e. 1152x768 screen, 16MB video RAM, 802.11b wireless, USB 1.0, etc.). Plus, if anything went wrong with the main logic board after 90 days, I'd be screwed (I'd be screwed tomorrow if the main logic board took a dump today but still have $500 in my pocket for a MacBook Pro...). Regards, -- erikv at mac.com