If you're playing ONLINE and using an iPhone, there is a chess.com app ... but it is not really a web page based app, of course. One can actually log in to chess.com using Mobile Safari, but the RETURN key does not push text in Live and this window in posting doesn't seem to work for me either (can't paste text into it from any iPhone app). I believe there might be intentions of improving / dealing with these issues in the future, but I really don't know for sure.
Would it be too difficult for the Chess.com staff to enable a chess.com web page for Blackberry and Iphone users?
Even though it is possible to visit chess.com from these devices today, at least from My blackberry it is hard to actually play, mostly because chess.com does not have web site version designed specifically for such users.
It would be great for me to be able to play while away from home or the office. It would probably help reducing time run-outs too. Just a suggestion.