Taken from the Crackberry Forums. ( I don't like taking credit for things that aren't mine). Thought it was definatly worth sharing!
http://forums.crackberry.com/f169/camera-fix-365534/
Somebody in the Droid forum posted a fix on the camera focus issue. Seems that there is some oil/film on the surface of camera lens. If you clean the surface of the camera lens witha soft cleaning fabric it will make your camera focus 100% better.
I tried it myself, and i get the green focus bars almost all the time now.
Thank you "cpetku "!
http://forums.crackberry.com/f169/camera-fix-365534/