this probably won't help, but my roommates crank wiggles too. it's pretty bad. i took a look at it and he just needs a new crank and bottom bracket because where the crank fits onto the taper of the bottom bracket, they don't fit as perfectly as they once did, no matter how much you tighten the crank bolt. this is mainly due to a cheap bottom bracket and crank though...and yours are not cheap

so, yeah +1 to bringing it back to where the work was done