Thanks, aflegg, /etc/others-menu was exactly what I was looking for. I tried moving 2400_osso_help.desktop to .2400_osso_help.desktop (adding the dot to make it "hidden"), but it looks like dot files are read, too, so I just moved it to a new .removed subdirectory. Poof, Help is gone! I envision removing more and adding some custom ones (maybe FBReader and the PIM apps, since I use them so much).

Now, for a similar question...

I don't suppose there would also be a way to modify the functionality of the "Email" button on the left? (the one that has "Go to Inbox", "New e-mail", etc.). Actually, it'd probably be best if I could remove it entirely, since I don't use the mail client (I prefer gmail). But if not, I could use the space for more of my applications, if there is a way to add launchers to that Email menu.

Thanks for the help!