I tried last year, but it's tough! This year I'll be having a cameraman with me more often, which hopefully will make it a little easier to get some good footage.
As for the arm questions, I only used the Lone Wolf and Pine Ridge arms last year and liked both of them. The Pine Ridge arm seemed a little more stable and secure to the tree with my bigger GL2 camera. The Lone Wolf seemed alright with a small consumer hand-held type camera. Although either one worked fine for self-filming with either.
This year we picked up a set of wireless microphones, a new shotgun mic, and a set of headphones for the cameraman to use when filming. Our camera looks like a freakin' octopus! Hopefully it pays off with some good footage though.
Good luck with the self-filming! One thing I wish I would've done is carried the camera's remote control with me for turning it on/off and start/stop recording. I got busted a few times trying to move to get my camera in position, turn it on, and try to get ready for a shot. And always carry extra tapes and extra batteries. You'll thank me later!