Instead of highjacking the silverwolf thread, I moved this to a new thread.
Via support would be nice. It'd also be nice if VIA supported Linux better. I think it'll happen in time. LinuxICE3 will use more and more OpenGL graphics and I don't think VIA's drivers are up to snuff. We'll see what happens with the openChrome project which is the best open source driver.
2-4 are already possible. Take this thread for an example of a slightly customized background. nGhost2 is completely skinable and supports transparencies. As for boot splash. I've created 2 example ones that are turned off by default. usplash-theme-linuxice, and usplash-theme-chevy. You can install them from LinuxICE in a few clicks using Apps->PackageManger->Synaptic and searching for the above packages. You can easily make your own splash screen as well and I hope to see more. Maybe I'll do a video on that and see if people will take advantage of this feature.