It seems that support for Subversion in IDEs is gaining more interest and is becoming more and more usable.
I just found the following projects:
* Subclipse for Eclipse (at SourceForge)
* Svn4Eclipse for Eclipse (at Tigris)
* Svn-Up - pronounced: Seven-Up, for IDEA (at Tigris)
I can't await using the full power of Subversion for everything I'd need version controlling!