WordPress Widgets allow you to create a custom sidebar, with RSS feeds, del.icio.us links, et cetera.
Tarski is set up to work automatically with the Widgets plugin. Just install Tarski, and enjoy your newly customisable (via Presentation > Sidebar Widgets in your administration interface) sidebar.
We can’t guarantee all Widgets will work out-of-the-box with Tarski, due to the varying ways in which they’re coded. You may need to do some CSS tweaking to get some Widgets to look nice.