Im beginning to understand now ...sorry for the delay, the forums have been crashing rather a lot.
When you open "incoming searches" you will see a stream of searches coming in. They are the searches being put into the network, by anyone for all sorts of things. now if one of the searches you see corresponds to part of the title of one of your peices, then your piece will hopefully show up in the search window of whoever made the search, but they are probably not looking for your piece so they probably won't download it! The reason why this stream is sometimes fast and sometimes slow, has to do with the amount of trafic at the time, and also whether you are running as an ultrapeer or a leaf, which can be seen in the Connections tab, but it is mostly unintelligble to most people so don't worry about it!
One or two people have put the names of their pieces in the forums, which is not a problem, PROVIDED no copyright breaches are involved, and the title of the artist also helps. It won't get you instant success... but it would be a start
I hope this helps a bit .... let us know