This may not be a surprise to many but I suspect more than one will find this thread and find it useful. Particularly Nikon users as they are used to being served well in time-lapse functionality. But for now this is the best super-zoom by far in my opinion.
I am happy to report that the following unit works just fine with the recently released DMC-FZ150 as a wireless shutter and intervalometer solution. Also if you remove the small rubber grommet from the top of the remote you can plug the cable into it, and your camera on the other, for a wired intervalometer (timer) remote configuration.
The wireless has been reported to have excellent range, and went through a few apartments worth of wall this evening just fine.
The vendor below got it to me in 6 days. If you observe the physical shape of the device you may as well buy another brand if you can not find this one. It is sold under a few brand names on Amazon and eBay.
You will not be able to extend the shutter past its already stated 15 seconds. But full manual, A, P, S, Auto, Bracketing all work fine. Changing camera settings between exposures, does not effect the timer settings.
You can program a delay before starting , hours, minutes, seconds etc. 1-99 exposures or set it to limitless exposures. Also a 1 second continuous exposure always available with this model as long as you have not programmed something longer in camera. There is a bulb setting I didn't mess with. But the meat and potatoes of the gizmo works just fine. The manual is pretty badly translated but gets the job done.
I'm glad I popped for the $75.00 for the wireless version instead of the $50.00 version as it is more pleasurable to use. And has a reported 80 meter range, one fella tested at 100 yards.
Here is were I bought mine. Hope this helps somebody.
Studiohut WIRELESS Timer Remote Control Shutter for Panasonic and Leica cameras compatible with Panasonic DMW-RS1 (Refers to the simple wired Panasonic shutter remote.)