I just came across a great site called MyVistaBoot.com . As the name suggests, it is dedicated to sprucing up that fairly boring Vista boot screen. Each new boot screen is packaged with an installer so it is trivial to get them on your system without resorting to the use of third party applications as was necessary with Windows XP. Take a look, there are some very elegant ones on there to suit every taste.
UPDATE: My mistake, the file downloaded replaces the winload.exe.mui file directly. It is not as simple as just replacing the Windows file but the instructions are clear and concise.
On my other site I have a few Geexbox themes that I threw together over a year ago. Geexbox is a minimalist media-center based on Linux, more information can be found on my other site. A year ago, it looked like the geexbox development team were moving over to Freevo rather than sticking with their Mplayer based template system and for that reason, I stopped making themes thinking my work would be obsolete within a few months. A year on and the decision to move over to Freevo has been scrapped and as such I decided to make a few more themes! I made a few today but this is the only one I am happy to release, hopefully I will release more in the next few days time permitting. Its a fairly basic monochrome theme featuring the early cast of Stargate SG1.
Head over to my other site to download this theme.