I've seen a few XOOPS sites around the traps which have a block showing a list of the most recently online members, and the time that has elapsed since they were last online. You can see an example of this at www.4thefort.com in the block titled " Hey! Didn't I See You..." in the left hand column of the main page.
I imagine this is done via a custom block? I'm just wondering if anyone knows how to do this, and what code is needed. Thanks .