[thalecress]

I use Google Desktop dozens of times daily. I suspect lots of enterprise users are in the same XP boat without a fast search paddle.

[cooperadymas]

You might be interested in:

http://www.voidtools.com/

http://www.launchy.net/

Not affiliated, just a fan of both tools.

[RossM]

I recently started at a small company; Google Desktop is installed on most people's machines, but people have installed it themselves, rather than IT doing so. To me, that is the definitive "I have made a user-friendly product" feeling.