I'm slowly moving the services and apps I have on my XBOX and NSLU2 to the SheevaPlug. I have successfully moved:
1) Subversion
2) Cross-compilation envs for PSP, ReadyNAS Sparc devices and DD-WRT
3) Rtorrent
4) Cups-PDF for PDF printing over the network straight to a user's samba share
5) Squid as transparent proxy to provide local web cache chained to Privoxy for ad and banner filtering
Still on the list are:
1) Compiling linux drivers for Brother MFC-440CN so I can use the Scan feature and have it save the image to a samba share on the SheevaPlug
2) Tor + Privoxy for online anonymity
3) Email server
4) Nagios
5) RSSDler
6) Asterisk + PAP2T + SPA3102
7) SSH Server for accessing my entire home network from anywhere via tunnels (still thinking if this should stay on my NSLU2 for now)
As for media streaming, itunes server this is already being done by my ReadyNAS NV+ and it will stay there. Automated backups are also working well on the ReadyNAS (WOL the computer, mount the folder to backup, rsync the contents, shutdown the computer. It will do these for each computer at home)
After I've moved all the services, the XBOX will go to our bedroom after installing XBMC.
did you finally manage to make asterisk work