For the past 2 years I've paid no attention to the PSP. I use to have 1.5 and Dark Alex's firmware's, but stupidly I put all that behind me and upgraded to 5.50.
Now I'm back, I just bought the Pandora Battery and will downgrade as soon as it arrives.
So, what's happened and what's new since I've been gone? I've forgotten most of the stuff, LOL! (I left around when firmware 3.0 came out).