This summer I saw a pair crossing Chain Bridge into VA...would've loved to see them attempt 41st St or even Glebe. It's too bad Strava doesn't have a CaBi plugin with CaBi specific KOM/QOMs. I think that could really drive up CaBi usage, just like the winter warrior contest they did that first year.
This was not a CaBi bike and I could have taken a picture because I was stuck in traffic going west-bound but I recently saw some dude on a mountain bike heading east on the SE/SW freeway east of the South Capitol Street on-ramp during the afternoon rush.
Given that the highway is elevated wouldn't it have been easier (and safer!) for this person to ride the ground level streets to get where he was going, as opposed to climbing 3 stories up an on-ramp??
Don't know if it was my report you're thinking of, but I did see that on a really hot day in July 2011. He was actually making pretty good time - we passed him at Belle Harbor, he got to Mt. Vernon as we were leaving, and he caught up with us again at Belle Harbor on the way back!