I went to Freshmeat.net and put IDE in the search field and got 5132 returns...I am sure one of them is a similar integrated development enviornment that would allow your friend to feel at home
As for selling him on linux...Linux is a programming envioronment. I hack right in bash, flip into vim and start hacking. I am kind of against ide's for the very reason you ask your question. If you become dependant on a program formatting for you, you can't port your abilities as easily...try to tell him he might like just relying on a text editor and the ability to code anywhere on any machine.