I haven't seen it yet (and I'm level22).
Re: Fallout3
On PC, anything zapped with laser/plasma would never again respawn, so I'm trained to never use them.
Good old bullets for me...
However it's a new game!
I do have a 100% plasma rifle, and some one-of-a-kind laser rifle, that I never use.
So thanks for the reminder - I'm gonna goo-pile some guys...
Regards