I had a chance to go out shooting with the Opteka BGRXT Battery grip on my Canon EOS 350d / Digital Rebel XT on Monday, and I have to say it was brilliant.
The grip gives you extra stability when shooting hand held - you've got much more to hang on to, and the extra shutter release and exposure controls make taking photographs in portrait orientation a breeze.
It is however noticeably heavier, and will take some time to get used to. My camera is now a little too big for my bag, so a new one could be on the cards. I know I won't have the grip on full-time, but it's so easy to take on and off this won't be a problem.
So if you haven't considered a grip for your dSLR, I strongly recommend that you think about trying one, it's like having a different camera!
Buy an Opteka BGRXT grip from Amazon.co.uk
Buy an Opteka BGRXT grip from Amazon.com