At least that's what my wife calls it.

Using the PC Engines ALIX platform - http://www.pcengines.ch/alix.htm an Atheros based AR5413 802.11abg 500mW mini-PCI card
External omni-directional antenna
8GB CF card
rugged case
Sprint USB card
External cellular antenna
Ubuntu 8.10

Picture here (opened) http://www.flickr.com/photos/dougnaka/3921609717/
I think costs were about $500, but would probably be under $300
I've had one in my car for the past couple months, and it's been constant, roving Wifi.
Don't take the Sprint cards to Canada though, $5k in one month roaming fees isn't fun ;)

I have upgraded my machines to Snow Leopard, excited to use the Exchange support.
Only to find out it only works for Exchange 2007!
So, to move my clients off Windows/Outlook|Mac/Entourage I have to upgrade my Microsoft Exchange server to 2007?

That's not really helping *me*, Apple...

OTOH; I love getting disk space back from an upgrade - Mac Air 64GB SSD users rejoice. AND I love Apple's family pack pricing for my home Mac's. Also, WTF dropping Power PC support this soon?