Im having similar problem.
Logic 9.0.2 doesn't load further this screen (Freezing on AURogerBeep)
http://i615.photobucket.com/albums/tt235/djelveno/Screenshot2010-05-30at52053PM.png
Logic would open if I disable CoreAudio by pressing & holding CTRL key. After enabling core audio from Logic preferences, This is what I see
http://i615.photobucket.com/albums/tt235/djelveno/Screenshot2010-05-30at73327PM.png
And few minutes later, this one..
http://i615.photobucket.com/albums/tt235/djelveno/Screenshot2010-05-30at90142PM.png
Im not using any DigiDesign hardware or any external soundcards or rewirable programs other than Ableton Live 8 at the moment.
Im using Snow Leopard 10.6.3 with 2GB RAM 2.16GHz Core 2 Duo Intel Processor, which is pretty much the required tech specifications without having any external stuff connected..
This is very annoying & Im on a deadline, Can anyone help me on this???