Good news: Angry Birds Level Pack 1 is now out on the Ovi Store and the price is 33% off! Go to nokia.angrybirds.com to get it now!
We hope to release level packs 2 and 3 around mid-July.
P.S. Ensure that you have the latest firmware installed on your device PR 1.2 (10.2010.19-1) and to launch Level Pack 1 you must already have the free version of Angry Birds on your N900!