Since September 17 (three long days and nobody broke the silence ?) the 3.0.1 maintenance release of Eclipse is available for download. There is a respectable list of bugfixes and the same announcement contains the links to latest versions for core plugins such as GEF, EMF, CDT and (surprise, surprise ?) UML2 (v1.0.1).
Yes, you can increment your SDK version via Eclipse update, but it doesn't work for GEF and EMF, so it's time to fire up those download managers …
PS: Well it seems that the automatic upgrade does work for GEF and EMF, if they're correctly installed, with features & all.