Well, I spoke too soon. Limewire connected once with the airport disconnected but then problem recurred even without airport. There is clearly some kind of conflict since web browsers (safari and firetox) won't access the web when LW is open. Saw this on both macs mentioned above. Messing with settings and resetting router didn't help. Comcast is not blocking LW. This problem occurred after updating to current version of LW for Mac.

kelliegirl: sorry but I have a mac so not much help in this thread.