well... yes, but not for any extended period of time. 😛
i've used quite a few widgets, but found them to be taking up too much screen space, and that got annoying after a while so i stopped using them. now i have Menu Calendar for my calendar, MenuMeters, for network, RAM, and CPU monitoring, so there's no need for an IP widget, or network traffic widget, or any of those other system monitor widgets.
however i am using the Flip Clock widget now, in the bottom right hand corner of my screen. i dont' have the time in the menubar, but i do have it from GeekTool (which is displayed in 10pt font) and now FlipClock, which is very cool, but does still get in the way sometimes.
i also did like the Run widget, you could press the hotkey, it would pop up and you just type an app name and it would run it. but it didnt' work for apps on other partitions, so that's pretty much useless for me. but i would have liked it if it was system wide, and had an auto-complete function. that would be awesome. 😀
if anyone has found a particularly useful widget, please let us know. 🙂