Warning, little educational content ahead, this is a holiday post.
None of these are what could be called polished jobs even given my limitations but the TwitterApi Documentation is pretty straightforward.
I have also created a few of rss twitter bots the most useful of which is ScotEduBlogs which tweets the blogs post title as they arrive on ScotEduBlogs this uses the twitterfeed.com : feed your blog to twitter – post RSS to twitter automatically I think.
The Oblique Strategies are a set of cards devised by Brian Eno and artist Peter Schmidt to solve (artistic) problems by drawing a card randomly. There is a lot of information at The Oblique Strategies. There have been a number of computer programs to show Strategies at random, web and download versions. (I even made a supercard project back in 2002). There is a nice php version, minimal design | Oblique Strategies, which you can download.
The ObliqueTweet twitterbot, just grabs the most recent @ replies to ObliqueTweet and then grabs a random Oblique Strategies and sends it back as a reply.
The script is automatically run using http://www.webbasedcron.com once every minute.
I am wondering now if I can think of a useful twitterbot, any ideas?