Also, note for all.. CAREFULLY read your isps TOS agreement which you agreed to. Almost all say [in a nutshell]

We may force you to pay for a business line at our sole discretion.
We may limit you in any way we please.
We may kick you off our network anytime we want..

Sad but true -- and its usually all there, although its worded in a decieving way..

the telcos have found out they have a golden goose and are laying the eggs very slow so they can make all the bucks they can.
Just like the RIAA they are greedy and hold back technology so they can make a buck.
We have technology now that can easily X5 all bandwidth but they hold it back so they can keep the charges high.
Gnutella and P2P will make the RIAA price CDs reasonable and make MP3s at 99 cents (so far)
So what will it take for us to get cheap unlimited bandwidth?
Will we have to provide our own home free for all netowrk via wireless before they wake up?
These big corporations suck, we shouldn't allow them to exist unless it serves the people in general, anything else is banned from "government approval".
We allow corporations to exist through our governments, which is through we the people, so they should serve us or be banned.

Gnucleus is also guilty
 

Well I don't know about Bearshare, but Gnucleus has a habit of retrying "dead" hosts pretty much forever, regardless of how many connection failures it gets.

So if someone's nucleus client tagged you as a potential source for a file, you will keep getting pinged by that client until

a) The download is finished (which could be days later)
b) The user cancels his download and re-starts it from the Partials section of the client, thus resetting all sources to 0.

If you have a static IP, Gnucleus clients trying to use you as a source can become a serious nuisance. The bug has been there pretty much forever but for some strange reason no one seems to take it seriously enough to get rid of it.

From the user's standpoint, the bug means that the longer the client is used (regardless of restarts), the more dead sources it accumulates for its downloads, increasing the ratio of "pointless" connection attempts to valid ones and generally making the download harder to complete, which in turn allows it to rack up even more sources etc. etc.

But don't try and mention this in the Gnucleus forum - You'll be flamebait in no time :)

Ask your ISP to block traffic to the port Gnucleus was on at your IP address or ask them to change your static IP address.

Yes, it sure is. BearShare 3.0.0 will give up much more easily.

If the source returns "not found", or it times out or refuses the connection too much then the source is trimmed from the list and will not be contacted.

In addition, BearShare will attempt to establish one connection per IP address at most when downloading files. If you are using BearShare to get multiple files from the same host, it will interleave blocked requests over a single keep-alive connection.

I would also like to point out that BearShare 3 supports full bandwidth controls, including the ability to limit hosts, uploads, downloads, and overall bandwidth.

I'd like to suggest write that in bold and blinking again.