New Del.icio.us Competitor BlogMarks.net
The new social bookmarking site BlogMarks.net has been launched as some competition to Del.icio.us, though I'm tempted to just call it a knockoff.
You can save your bookmarks publicly or privately. There's a Last Public Marks page showing the most recent ones, the user who bookmarked them and how many others had saved it previously. Each bookmark can be tagged, which makes it possible to display a tag cloud sized to reflect their popularity in the site's database.
The site has an API that uses the Atom Publishing Protocol to manage bookmarks. Since that protocol is not yet finalized there may be changes to the API calls.
BlogMarks.net was begun in September 2003 by French programmers Benoît Fleury (Benfle) and François Hodierne (Znarf) as an Atom-powered wiki engine, switching four months later to linkblogging. We'll see if it has staying power.