I have opened the source to the J2ME version of Pipes. If you’re interested in contributing to the project, it’s hosted on Github:
http://github.com/mkerley/PipesJ2ME
Anyone is welcome to submit source code, documentation, translations, etc. directly to Github. I’m putting the source under the GPL license.
I’ll be happy to answer questions about the source and the code architecture, but I probably won’t be able to help much regarding how to use Git or Github. Most of my experience has been with Subversion, CVS, and Perforce, so Git is still new to me 
Note: The iPhone version of Pipes will remain a separate closed-source project under my personal ownership.
On the iphone you can see online best results for each level. Is there a website that shows the best times online?
No, I don’t have those results viewable online right now. They can only be seen from within the game.
By the way, I have a separate page for discussing the iPhone version:
Pipes (iPhone)
Hurray to Michael! I hope that I can make a javascript version of pipes sometime later with the help of this… Mouse clicks and big screen would help game play a lot!
Hey, I just wanted to thank you for your work on Pipes. It’s a great app. I can’t wait to see more from you in the future.