http://www.motionbased.com/

There is a flood of info going into Motion-Based. In MB you can see people's actual results from their Garmins plus the elevation profiles. Basic accounts are free.

I search on city or key words all the time. For instance, all of us on Party Pardee Saturday reported lower than usual elevation gains (probably due to barometric changes). Last night I found 6 downloads from Saturday and another 8 from previous (probably volunteer) rides that reported much higher gains. The numbers looked more in line with my past years' results so I reported the same 4,100' that I always have and don't feel like I cheated in anyway.

You can search www.bikely.com (which Jobob mentioned the same way) and find profiles and elevation gains. The elevation gains in Bikely appear to be somewhat in the ballpark of real life, maybe a bit high but not bad.

www.routeslip.com - similar to bikely.com, slower to use, can't edit routes and elevation profiles are skyhigh, but can be a source for route ideas.