The Weather Channel has a special web site you can access with your phone. It is kind of generic, but if you are looking for aviation weather reports, try http://www.hz.com. It's a free program that will send TAFs and METARs to your phone or pager by email if you email it your needs after registering. Live radar by cellphone is just now becoming available. I've seen ads for some AT&T phones that can download live radar, but the service costs a few extra bucks a month.