A little bit of publicity and links are worth much more than bare money.
I wrote a short Premus review here the other day and now David has updated the online demo to the latest development version that includes the validator, better source view and syntax highlighting.
He also squashed a few bugs here and there.
Bookmarking has been disabled due to spammers immediately using it to publicize their sites. The current version shows how bookmarks can be used, but you are not allowed to create new ones. If you make a local install you will be able to use them, of course.
Message to David: you need to practice your communication skills, the changelog is too short! 😛