I might as well toss around my own thoughts and ideas, because that is part of the fun.  The tech-based ideas I have could go with a fairly normal cyborg or android sort of character using a lot of gear for most things.  Alternatively, one way to play with the concept is to mix it a bit with aliens and such: the character's actually an alien pecekeeper (and possibly very advanced probe, not an actual member of some alien race) sent to Earth to check things out.  That option does allow for more flexibility in powers, as we're looking at sufficiently advanced technology and could thus really run anything, instead of strictly weapon summoning or the like.  

For other things like just power sets that might be fun, some sort of light manipulation, at least sometimes for making laser beams, might be fun.  Or electrokinesis.  Or maybe that Gambit-stlye charging stuff up with the ability to explode.