An employee of Codeorama suggested I look at their WebOS.
Very cool looking, but so similar to Apple OX X's desktop that I fear for Codeorama's legal future. It is said to work with FireFox and Internet Explorer, but also came up in the Opera Web browser I use -- but many items failed to work.
I switched to FireFox, and more items worked, but then Codeorama crashed FireFox when I closed a window. Of course, that might be a problem with the latest rev of FireFox, because my wife experienced it crashing multiple times accessing the Globe&Mail Web site on her computer. Other "problem" for those of us of the English-speaking persausion: being from Brazil, Codeorama is all in Portuguese.
Still, Codeorama shows what's possible in a browser. I heartily recommend you take a look; after all, there is no software to install. It has utilities like picture editing, postit notes, and the full-featured but badly-named FCK text editor. Tip: Press F11 to maximize the browser.
The question in my mind, however, is "Why?" Why have a desktop running a Web browser running a desktop? (Which can run its own Web browser, which can run Codeorama, ad infinitum...) Maybe one reason is that I could access this stuff from nearly any Internet connection -- but I don't have that need.
Maybe it's just me: I don't get gadgets (widgets) either, whether running on the desktop or in the browser.