What to Do With a $99 Wall Wart Linux Server
Likely said before, but this would be perfect for a file backup/media server. Connect a USB drive, tie this little guy to a backup app like jungle disk and you have a remotely accessible file server that can be backed up offsite.
Parent-Friendly Wireless Bridge To Span 500 Meters?
Why not use a cellular wireless internet card? All major carriers carry them. If he can get cell phone service, he can use them.