@Merlin:

I found that one by accident some months ago. One of those things that you figure everyone else must have found before you, because nobody's said anything about it. :)

The idea of bookmark folders as mini control panels is an appealing one. I've got one for all my LJ tools ("friend groups" controls, the LJ Recent Comments control panel, etc.), but there have to be other things you can do with it... sadly, it doesn't seem to work with bookmarklets. :(

@Alastair:

Until a month ago, I was in your boat, but I just changed from cmd-space back to ctrl-space, for two reasons. One, because if you're on a mac with international keyboard stuff set, cmd-space changes you between keyboard layouts. Thus, I would try to invoke QS on my fiancée's iBook and end up typing in romanji. Second, QS has a new feature where you can invoke the interface with the tap of a single key (ctrl by default). Once I got in the habit of doing that (it works in mid-drag-and-drop), ctrl-spacebar just made more sense.

BTW, I suggest playing around with this... it seems to work more naturally when in "mouse mode," i.e. when I have one hand on the mouse, and the other on the keyboard to execute key commands. In comparison, ctrl-spacebar is entirely natural when both hands are in natural typing position. Note also that the new "Primer (built-in)" appearance has controls that respond to the mouse, if you're kinked that way.

I think of QS as its own environment, now. It has its own command-set, using the control key, and its separation from application-environment command keys is entirely natural, once the mental gearshift is well and truly complete.