I can see Peddler in four different decks at the moment:
1) Noise - being able to play Parasite mid-run without Clone Chip is fantastic, especially thanks to the surprise factor. Street Peddler allows this with any virus, really, and combined with Noise's ability seems to put a little pressure on all servers (could she be offering a Medium or Nerve Agent?)
2) Hayley Kaplan - Street Peddler does two things for Hayley: allows her to install another Resource on the same turn, then on a future turn install something else. Can't get any better for synergy out of faction if you ask me!
3) New Criminal ID - The one that draws 1 card the first time they use a ability each turn.
4) Connection-oriented decks that use Calling in Favors. That card seems to get better and better with each data pack!