Tagging Deskop

I've been thinking about an application like this for a while, but have been unable to express it in words. Recently I had some incites on how to implement it with all the "tag fever" going around.

Here's my thoughts on the subject:

Tagging seems to be slowly taking over the world. I can tag links using del.icio.us. I've tricked outlook into tagging my work emails. Gmail allows me to tag my personal mail. Using flickr I can tag and organize photos. Each application has thier own tagging methodology and madness. There's nothing drawing it all together.

I want a tagging desktop. The ability to tag anything, emails, tasks, links, pictures, documents, anything and see everything grouped by those tags together on a dashboard. If I was working on foo at work, I could flag all emails that pertained to foo as foo. Any Word documents could be tagged as foo. If I was surfing I could tag any sites I found as foo.

I could then go to my dashboard, click on foo and see everything I was working on that had to do with foo.

I found this site called SuprGlu which will gather RSS feeds by tags and creates a tag cloud. Which is sort of what I am looking for, but not really. A tag cloud shows the most commonly tagged piece of information, but does not allow me to prioritize tags, which is what would make the whole Tagging Desktop useful.

Also see my del.icio.us links on the subject.

Any thoughts or cool websites that accomplish something similiar?