In the SF Bay Area, some Fry's stores have working models too (of course the phone isn't activated, but it's a fully functioning model, not a dummy).
Originally posted by bluemug:
It took me 4 months but I finally found a store that you can try out the Treo. Here in the San Francisco Bay Area it's at the Comp-USA store at 40th and San Pablo in Emeryville. Maybe other stores have it in stock too, but I couldn't find any.