Add me to the list.
My setup is completely different though:
IPhone 3Gs
ITunes Remote on IPhone
Pioneer VSX-50 Receiver with Airplay
Samsung 46” LED 3D TV with Allnet
HP MediaSmart Server Wired Ethernet to Main Router
HP Desktop with Intel i7 and 24GB RAM Wired Ethernet to Main Router
CISCO – Linksys RE1000 Wireless Repeater
The TV and Receiver are connected to the CISCO repeater via Ethernet cable and 4-port wireless switch. With this configuration I can play HD 1080/60P movies with Dolby Digital Surround without a hitch. Plenty of bandwidth.
When I run ITunes on my desktop (wired Ethernet) and direct the playback to the Pioneer receiver the Airplay crashes in about 2-minutes. My desktop and server (both on the wires) lose the gateway address, meaning the main router (192.168.0.1) and I have to reset the adapters manually to get them back online. Wireless connections to all other computers and printers in the house are unaffected. This includes the IPhone.
This morning I ran a long Ethernet cable to the switch that connects the Pioneer receiver and Samsung TV to the main router bypassing the CISCO wireless repeater and was able to Airplay all morning. I switched them back to the CISCO Repeater and the crash came within 2-minutes with the wired computers again losing the gateway.
Another interesting thing is that after resetting the network adapters and getting connectivity back, the computers will again lose the gateway in a few minutes, even if ITunes is closed on the desktop, but Airplay on the receiver is still up, with no music being AIRplayed.
I can conclude that in my case the crashes have nothing to do with the IPhone and all to do with Airplay running over wireless. This even though my wireless is N and has plenty of bandwidth, being able to play HD movies with surround sound without any problems whatsoever. So wireless Airplay is broken, not any of the hardware but the airplay software itself when an airplay receiver is connected via wireless.
Best,
Jose