Update: The XPI I posted was a) corrupted and b) not able to be served from youngpup.net (the classic XPI/mimetype issue). Sorry about the false start. Reposting now to mozdev.org. Will update again here when it is available.
If you like living on the edge, you may want to try out Greasemonkey 0.3b Beta.
The most noticeable user improvement is the addition of an "edit" button in the manage dialog and a little greasemonkey icon in the bottom right of the screen that you can use to disable GM quickly. Also, we now work on FF 1.0.3. Under the covers, developers now have access to GM_setValue and GM_getValue for persistent storage.
If you decide to try this version, please be aware that there is a pretty significant config migration that happens the first time it runs. You may want to back up your existing configuration before installing. Check the FAQ for details on where to find it.
As always, please report your bugs here, or on the mailing list.