I has been meaning to get one of these for a long time for doing widefield shots with the Polarie (stacking multiple shots). Up to now I had been doing it manually with a release cable.
I looked up the Canon intervalometer at Camera House-$299
No way I am paying that. Fortunately they had the Hahnel GigaPro11 which is a wireless device for $99. Much better deal
http://www.hahnel.ie/index.cfm?page=...s&id=80&pId=80
Its really small and light with a claimed 100m range. Just tried it out this morning and it seems to work very well and is easy to program. It can run 99 cycles and then repeat that 99 times (so just under 10,000 shots possible) and no cables to get caught up in.