I have another alternative to this...
There's an open source project called Bookmark4U it's a php/mysql based project that allows you to set up a bookmark holder that's web based.
I originally looked at this for bookmark portability without having to rely on anyone else for the service.
Also I wanted to be able to reflect last visited sites on my blog.
Since BM4U tracks your visits I just wrote a small php scriptlet that queries the last 10 visits to specific categories and general categories from my bookmarks...
You can see an example on page. I also wrote a bit more about it on
this entry.my blogThe end result works a lot like blog rolling but more selective. Also BM4U really is a great tool! :D ;)