Posted for "richard  titsworth" <rtitsworth@mindspring.com>:

 I've been using XM weather on a laptop (WindowsXP) in my Cessna for 1.5
 years...
 
 Experience has taught me that ideally the laptop/table should be dedicated
 to your airborne needs - WXWorks/Whatever (it can't also double as a remote
 email checker, networked Duats access, etc), and you'll want to spend some
 time/energy disabling everything possible that Windows thinks it wants to do
 for itself - ie. all virus scanning, hard disk defragmenting, Windows update
 service messages, etc.
 
 It's a REAL pain in flight when it wants to act up (you know windows -
 thanks again BillG).  Waiting, Clicking, and/or Rebooting is a ROYAL pain in
 flight.
 
 My .02