My new tool, AutoINF, can generate Autorun files -- just fill out a form and you're done. It's written in NSIS.
EDIT: New version released. See this thread for details. Also, the KeyUTIL Package has merged with Libertà.
It's part of the new KeyUTIL Package, which (when more apps are released) will be a set of utilities for USB flash drives. If you're interested in helping make more utilities, e-mail me or post a reply.
What do you think?