What are some cell phones with Wifi?

The Mogul, I believe has wifi

n70 tablet - not a phone though

iPhone of course and the T-Mobile Dash

The Neo1973 from FIC will have wi-fi and is scheduled to arrive somewhere in October or September I believe. Some people have already ordered the phase1 deviced but those are for developers and don't have wi-fi and some other features yet. More information on OpenMoko.com .

The Asus P525 has wi-fi but I've never used it myself so I don't know how good it is.

These reviews might help:
- MS Mobiles review of the Asus P525
- CNet Australia Review of the Asus P525

The Treo line of Smartphones unfortunately does not have wi-fi, but you can get wi-fi capability on the 700w and the 650 by getting a wi-fi card that fits into the SD Card slot. Not sure a wi-fi card is available for the 680, though.

I'm currently searching for my next smartphone and I'm hoping to find a unit that I'll like which has wi-fi.

Ah, the soon to be released Blackberry 8820 has wifi.

iPhone of course :)