Data Recovery in Linux

Tonight after I finished my 3rd subject of the all five subjects in the exam of this semester, I am having time to browse the internet on my favourite Debian box. I found a blog of a guy telling about how he used Linux to recover his lost FYP (Final Year Project).
At part 2, he linked to ReiserFS undelete/data recovery HOWTO, which also has a links to blog of Marty , which helped him to recovery his important data erased by the command #rm -rf * .
I think it is a good news for people who are programming in Linux, because losing some part of codes in an important project is often.