Citrix XenServer Templates
Hello,
I kinda accidentally found this site and immediately downloaded the Gentoo 2010.0 i386 image.
Although not fully tested - I can confirm that with a tiny amount of playing about, the process of installing these images (well, the Gentoo one at least - but as they use the same kernels, then the others _should_ work too) and converting into Citrix XenServer Templates is relatively easy.
Paravirtualised and up and running in no time at all.
I could also suggest that maybe ready to go templates could be made available from this site or... I could just simply let people know how I did it :)