Yeah, the same thing happened to me a couple of years ago and at the time I thought I was the coolest guy on the planet when I recovered most of my data. I had accidentally deleted all my chat logs. Luckily, all the chat logs had a timestamp in them, so I just searched for all timestamped lines on the disk and dumped them to a file. I then wrote a script to group and sort all the logs based on the date and who I was talking to and recreate all the files. It worked better than it had any right to especially since I was doing everything on a live disk!