kernel.  We don't offer the image upload option quite yet (but it's on the way), but we are offering pv-grub (in beta) for customers to use whichever kernel they like within their instance.  Once that comes out of beta, we will probably build Fedora images with pv-grub enabled and the Fedora kernel installed from the start.

Is this going to be specific to Rackspace, or is Rackspace's sibling Slicehost going to have this option enabled as well?  If this activity will have zero effect on Slicehost, do you all have more of an inside track on who we could get with at Slicehost for the same sort of effort?