If you don't follow citisven's blog posts on DailyKos, you should, especially if you are environmentally-minded. He is one of the great bloggers behind DK GreenRoots, an effort by the kossack community to promote environmental posts on DailyKos. This post talks about a really groovy-sounding event he attended in SF that included a bike tour with some Dutch folks on Queen's Day. Please look at the post because there are a bunch of really great photos (one of which I swiped for this post).
Hope the weather is nice in your part of the world to go on a bike ride :)