Version 1.0 is the only one that seems to work. The others all come up blank when loaded. For some reason though I can't seem to be able to get the configuration menus to appear for any plugins. I could have swon I got this working at some point.
Turns out the reason no config dialogs appear was due to some conflict with a plugin I wrote to display all blogs. Removing that lets the config dialogs on other widgets work fine.
fyi: I installed the widgets directory into systemplugins.
The version number in the header of the widgets code posted by nuno and Zechary appear to be *slightly* older versions of the files from the svn repository. The are a number of differences through the code -- I didn't spend long to work out what those differences mean.