As far as accessories go, I have the Body Glove case. It's rock solid and very tough, if a bit bulky. I tried a cheapo hard plastic case, but it did not cut the mustard.
I have also found that the data/power cables are not fully interchangeable. When rooting my phone, I found that using a generic USb cable did not work. I used the included data cable and it was no problem.
I tried a screen cover, but the screen is tough, so it's not needed to prevent scratches. I wanted it mostly for poke and crush protection (leanign against something with phone in pocket) but I tore it off. THe Body GLove case rises above the screen to help protect, at least from flat surface.
I love my cheap Virgin Mobile phone.
I am seriously considering getting the universal wrist charger i found online.
It's available at thinkgeek