I conjured up a set of Sniper Unlocks, and only just got them in under the wire - before Valve came out with their "official" stuff.  I don't know, I think this one could be more useful:

(You can see the full set of three over at Lowpings.  One the one hand, they pay me to write things - on the other, I really want to share my work with the awesome Bitmob.  I think posting my favorite here and providing a source link is a fair ethics trade.)