When my iPhone is connected to my home wireless network, the internet is unusably slow. I installed the speedtest.net application; here are some results from tonight:

• Down: 0.0kB/s, Up: 0.0kB/s, ping: 2230ms
• Down: 2.5kB/s, Up: 40.5kB/s, ping: 2182ms
• Down: 0.0kB/s, Up: 20.0kB/s, ping: 197ms

For comparison, here is the result from my iMac to the same server, which is on the same wireless network (and has no wired connection):

• Down: 139kB/s, Up: 53.8kB/s, ping: 182ms

Neither my iMac nor the Dell laptop also on the network have experienced the wifi problems I get with my iPhone. On the other hand, I tried browsing a website on the wireless network at work with no problems.

EDIT: SpeedTest at work gives me 156kB/s down. EDIT2: Girlfriend (owner of the Dell) reports actually the internet is sometimes very slow. Perhaps there is more going on. No problems with my iMac.

My router is a ASUS WL-500g Premium V2 running OpenWrt Kamikaze with X-Wrt Extensions 8.09.