I mentioned ifttt last year: it's a web automation tool that lets you glue different web services together. I used it to build a 6music bot this year which was very well received.

I also use it to back up my own twitter interactions. All of my tweets and mentions are emailed to me. I can then archive those mails with the rest of my mail.

I wrote a small python script to clean up the mails that ifttt spits out. The resulting mails are now only about twice as large as the maximum length of a tweet, rather than orders of magnitude larger. I've published it here: twitter.