@jeff hmm, not sure, I don't use BBEdit. If you know where the settings you want to synchronise are stored, simply copy that file(s) to where you want them on Dropbox, and symlink it/them? Have you try it?
If you use Dropbox, you can relocate your BBEdit application support data to your active Dropbox folder, and BBEdit will use them there in preference to the locations in ~/Library/. In this way, you can easily share supporting files with multiple BBEdit installations (handy for multiple machines on your desk).
I wish there was a way to sync language-specific settings for BBEdit via Dropbox.
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