Hi Chris
Well, you big spender you!
If the 50D is like the 40D, then it will likely use the Canon proprietary N3 connector. I have the plain
remote release RS80N3 and the
interval timer TC80N3 as well.
Congratulations on the new 50D!
Cheers
Dennis
PS - Here's the link to DDP - scroll down the web page:
http://www.d-d-photographics.com.au/canonlenses.htm