shamus: let us know when your site is up.
chariklo: I enjoy shooting wildlife with my Canon. There is a wealth of information available to you on the net in the way of free training and reviews. Whatever camera you use... just get out there and shoot and learn from that. The only things I find myself short on is time and of ccourse $.
Six: right now APS-C - Canon 7D and other older versions. There is a full frame on the horizon, but I will need to recover from the next lens purchase first.
I've been using a gimbal head on my 100-400 and also a gimbal style ball head, but neither of these will handle the weight of the 600mm. So I'm leaning towards the Wimberley head - pricey that it is.
I found a nice solution to lugging my gear for most hikes that have smoother trails. I bought one of those portable jogging strollers with larger pneumatic tires (Target on sale for about $100). With a few additions of some straps and velcro I was able to make a pretty nice cart to push along my gear. Helps the bad back and neck.
Thanks to all
Happy shooting