Well, there are some things you should know:
- It has no sound capability.
- It has only a few (maybe 8) MB of video memory, so Aero or any graphic-intensive activity will not be possible.
- It does not support add-in graphics ... you might be able to find something that will work, but it will be VERY hit/miss.
- It may be fitted with a RAID controller. If so, you will need to load drivers for it during the Windows install.
- There is a very good chance that your processor is 32-bit only.
- Drivers will not exist for some devices; you might be able to use Server 2008x86 drivers for some devices, including the RAID controller.
What do you plan to do with it?