I have also the same upload problem. With Bearshare lots of people (60-80 % of them are bearshare) download from my computer 24/7. With glucleus, phex or limewire the upload result it is much less.

BearShare 600-900Mb for 24 hour
Other 100-300 Mb for 24 hour

Why, I do not understand this?

For upload the BearShare is still the best!
For download there are better ones.

I do not download much file's. 1 or 2 a week. So I use now the bearshare 24/7. So people can upload lots of file's from my computer. "BearShare the power to share" is in my situation true.