I haven't played with it, but I was able to install the Fedora14 virtualbox rpm without any problems.
The only thing I recommend, is that if you are going to use dkms, do not use the F15 version as
the autoinstall functionality is utterly broken, at least it is for me. Install the F14 version or use the
actual 126.96.36.199 release from Dell's website if you encounter problems with it.