Cloudmarks is a Safari extension that works with cloud bookmarking services Pinboard, Delicious, and Google Bookmarks. Cloudmarks lets you access your cloud bookmarks in a popup menu so you don't have to actually go to the bookmarking website.
What's new in this version:
In the Add Bookmark form, pressing Enter while the tags field is focused will now submit the bookmark if the tag menu is not open. This brings the behavior of the tags field in line with the other input fields.