Congrats on the rooting!
I'm getting more daring with ROM flashing. I'm finally on a nightly build of CM7 (Winner00's 122 for Droid).
Also have ChevyNo1's Low Voltage 1GHz overclock kernel on top of that.
There's also the V6 Supercharger script that has set some memory options.

TiBU, SetCPU, ROM Manager, Battery Monitor Widget (and more) are all favorites.
Favorite info sources:
xda
droidforums
CM forums

I used to be on Howardforums quite a bit, but now go there only rarely.