How do you ensure, that you can checkout the code into Eclipse or NetBeans and work there with it?
Edit: If you not checking in ide-related files, you have to reconf
Here's what i do:
This way you get IDE independent build scripts and happy developers :)
There's a blog on netbeans site on how to do 3. but i can't find it right now. I've put some notes on how to do the above on my site - link text (quick and ugly though, sorry)
Note that if you're using Ivy (a good idea) and eclipse you might be tempted to use the eclipse ivy plugin. I've used it and found it to be horribly buggy and unreliable. Better to use 2. above.