Online Bookmark Manager...

I'm trying to find a good online bookmark manager I have looked into most of them that are list on http://useful.webwizards.net/wbbm.htm but I haven’t found one that I really like yet. Does anyone use one or know of one they think is good? There surely has to be a good one out there somewhere, but until I find one I guess I will have to write my own.

I'm currently working on a webservice that will allow me to manage my bookmarks. I'm storing the bookmarks in an xml file that matches the format for Microsoft’s Treeview WebControl, so I can easily set the xml source for the treeview. I would like to use this as a sidebar. I can do this in IE by opening a link to my treeview with the target set to “_search”. I’ve been trying to use Firebird though after hearing about it from other .Net Blogs, which I like thus far but it doesn’t support a sidebar as far as I can find yet.

If anyone has any suggestions for me please let me know.