If you use the (delicious) tag here on LJ, it should be okay to index your new posts to delicious -- there's already stuff in the directions about how some posts may have already been indexed, and how to recognize that. And I certainly haven't heard any confusion about it from people who have been doing the work.

Oh, hurrah! I am glad that you're getting some use out of the delicious listings. My fear was that having them offsite would just remove them view, and thus also remove them from use. And I'm sure that'll happen at least some anyway, because that's the way user-interfaces are. But what I hoped was that the functionality (having as many tags as we could want to use! being able to mash-up tags!) would be at least a partial offset to the inconvenience of having it offsite.