Zeppos and Space Pirates
Disclaimer: I don't own Stargate SG-1 or Buffy the Vampire Slayer.
So, knowing Xander's luck with women, one can assume that he might hit it off with a certain space con-artist...
Here's another....Xander/Vala where Vala's feelings for Daniel get in the way.
Bunny: Xander seems to attract strange women (especially demons), so it only makes sense that he'd attract a space-pirate alien who used to be a host to an evil gou'ld. However, Xander can't help but notice that Vala still has the hots for Dr. Jackson. Jealousy ensues.