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My 3 week old iPad running iOS 3.2.2 has NOT experienced any issues with jumping WiFi.

I am on a Linksys WRT54GL router running tofu 13c modified firmware on Channel 9 using WPA PSK. There are several access points within 1000 feet of my home that are on channel 6 or 11.
 
No issues here. Linksys router using WEP over G wireless. Seems a bit faster since the first OS update but never really had a connection problem.

OP have you tried another wireless network? That would help narrow down the problem to either your iPad or your network.
 
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