Everytime I see this thread, I smile. So bump.

Ginger - it lets you open/launch stuff without sorting through folders for it. Say you have a doc that always gets printed for client meetings. Ours is in a folder on the shared drive, in documents/weddings/printout Instead of navigating thru all that, I push alt+space, type "print" and it shows me "Print This" which is the file name. I press enter it opens, I print it. No searching.
Say I want to open Excel, I alt+space, XL, enter and it's open.
It's speeeeeeeeeeeed. Really awesomeness on speed.
(Yes, I know quicksilver does the same thing - this one's for pc....)