Based on this thread from this month's (April 2011) Open Thread, we have started work on exercises to go along with the posts and help readers internalize the material better. The idea is to have exercises covering all of the sequences eventually (though there doesn't have to be a 1:1 correspondence between exercises and single posts)
help is very much appreciated. If you want to take up writing exercises for a post, please claim it on our wiki page.
A few drafts have started to circulate, and soon we will have our first exercises posted.