Found this gem today!
Use this link to search for mobile links by or sponsered by Sprint:
http://mobilesearch.sprintpcs.com/
For instance, some nice links I came up with:
Reuters Mobile (yeah, that's Reuters, finally accessible without AvantGo!):
http://mobile.reuters.com/sprint
Bloomberg Mobile:
http://www.btogo.com/sprint/xhtml/home.asp
PictureCast:
http://sprintdemo.getty.mlogic3g.com/
TV FastFind:
http://sprint.tvfastfind.com/premium.com/
Hollywood.com:
http://wap.hollywood.com/xhtml/default.asp?afid=wapdsp
Charles Schwab:
http://pb.schwab.com/
Overstock.com:
http://sprint.mobile.overstock.com/