I picked up a hähnel Giga T Pro II RF remote. Interval timer, the remote unit is small enough to fit in the palm (for getting in the picture if needed). I like that the remote unit can actually be plugged directly into the camera if desired (i.e. used as a wired release) for interval timing, etc.
+1. I have this and its very good, its more than just a simple trigger, with an intervalometer etc built in. One annoying thing with it, for me anyway, is that the remote will power off after a minute or so, therefore if you are scouting about with your camera set up and see something you want to shoot and you haven't used the trigger for a few minutes you need to turn it back on again, which takes time. It might be possible to change the standby duration in the settings but I've never got round to checking.