Found this today.

http://tools.chocoflop.com/entonnoir_en.html

It's a program that will let you set a cap on your download/upload speeds to keep from bogging down the network when doing huge uploads. I constantly upload a few gigs at a time and I do most of my uploading from work where i have a 3Mb/s upload speed as compared to my .5Mb at home. I use this program so I can take advantage of the fast upload speed here at work without slowing other people on the network down.

Here's a screenshot of it working.
Name:  Screen shot 2011-05-17 at 3.13.04 PM.png
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Anyway, thought I'd share since I'm sure a lot of you do the same.

-Adam