Sitebar is the greatest bookmark manager, I run my own server and once again control my own destiny! Check it out if you are interested in a great LAMP bookmarking solution. After you set up your own server, make sure you get the Firefox plugin! Or roll your own version, like I did on my portal.
Recently, I kept having to re-login because my session information kept getting lost. My workaround was to add my server domain to Firefox’s Tools->Options->Privacy->Cookies->Exceptions list, to “always allow”. I had to add the “second level domain” (without the “www”) to get it to work.
I’m very happy now with the latest stable version (3.3.9), but I’ll probably jump on 3.4 when it becomes marked as “stable”, soon… then I can have fun with stuff like this!