Seldomly used Windows Programs

I know this is a bit random but there a quite a few programs that I use seldom in Windows that are being carried over into Windows 7. It's nice to be able to disable seldomly used programs in 7 like Windows Movie Maker, Media Center, etc. because most ultra mobile devices with solid state drives don't have a lot of space. But what about programs or features like Windows BitLocker or CardSpace?

Does anyone use or know of a reason to use Windows BitLocker? How about Windows CardSpace? I know most of these programs are tiny, but the more control the better and if you only have a 16GB SSD then a 100MB becomes a lot more noticeable!