Gnutella DoS attack?

[sdsalsero]

Something's gotta be going on here... Over the past two days the number of people downloading from me has been steadily dropping. I haven't changed anything on my end so I assume they're being blocked somewhere. I keep reading stories about companies hired by RIAA and MPAA to disrupt P2P networks and I suspect this is the result.

Does anyone have any idea what's happening?

The way things're going I'm gonna have to switch to another P2P system, which I would hate to do after being a loyal Gnutella (and Limewire) supporter for the past two years.
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I just tried restarting LW and enabling Ultrapeer (I usually reserve my bandwidth for uploading). It took almost a whole minute for me to establish a stable connection to anyone! What could cause that? I seem to be properly established as an Ultrapeer now, at least...