If you want to keep up to date with the latest on the PTR's check these 2 websites every day.

http://www.worldofraids.com/

http://www.mmo-champion.com/

This way you can plan how many badges, honor, or arena points you want to save up for when 2.3 goes live!

I also like

http://www.wowinsider.com/

for general WoW information.

J