There are various IDEs available out there that can be used for IronPython. One of them is Eclipse + PyDev + Subclipse for version control. The nice thing with this setup is that it provides intellesense and it does understand Python language well.
Setting it up is fairly easy. First download Java Runtime, I have used v6 update 32 for this exercise. Second, download Eclipse 4.1 (4.1.2 as of this writing). The way I see it, version 4.x is not yet for the mainstream use but it does work fairly well. Third, install latest PyDev and finally install Subclipse for SVN integration.