I'm digging this great online time-tracking site: SlimTimer

But instead of opening a new window, maybe it can open the window in the search sidebar. Here's the code...

<a href="http://www.slimtimer.com/client" target="_search" title="SlimTimer">Open in sidebar</a>

Open in sidebar
For Opera users, drag link to the sidebar

Update (8.3.2006): Opera notes: The trick with Opera is to instruct users to drag the link to the sidebar. Also, you'll need to set the title attribute to something descriptive because if it's empty the bookmark will be titled whatever the link text is. You don't want the bookmark to be called "Click Here".