Aside from that...
Love this camera. It's been my workhorse ever since I got it & it hasn't let me down... although lately it's been slipping. Dials stop working suddenly... batteries are shorting out. I think it's time to save up & buy another body... I'm thinking a 50D. I like the body style, which is almost identical to the 40D (hence why I like it so much), and I don't have enough for a full-frame body yet, and the 50D is just under the price that would be expensive, so that's why I'm considering it.
Sadly, I think the good ol' 40D will be put on reserve soon.
In other news, I've been looking at a lot of flash units recently. I was thinking I would get a Canon 580 EXII as my main flash, then use some cheaper SB800's for the secondary units if needed. What say you guys?
I have a 580EX II and it's a mighty flash. I can't comment on using Nikon flashes with Canons personally, but I can vouch for the 580EX II and 430EX II combo
Would you not be able to go for a 60D? It has a few appealing features over the 50D... You can fire speedlites remotely for example! And take video if that's of ant interest to you.