These are sites we at MobileTV4U regularly use and would recommend.

Kobrawap - Free Mobile Downloads and Chat
One of the best chat sites on WAP, allows free chat, blogs, forums, photos, private messaging and more.

Hotfile - Free File Sharing
Upload and Swap Files with Friends and Family

WapBay - Top Downloads
Possibly the largest collection of downloads you will find anywhere

00Zap - Cute or Boot
Upload & Share your photos and send messages to friends.

Google - Search
Email and Search Engine.