I use nokia E51 with wifi and nokia 5230 with gprs connection. I have never had any problem. gprs per speed slow hoti hai and its because of mobile network. By the way, i use opera mini with mobile view and sometimes with mobile view off, depending on need. Opera mini is a must for thore using mobile internet (GPRS)
A site optimized for mobile would be great but current site is also okay with me
(posting this from nokia E51 using wifi)