The only thing more annoying than the banner, is the fact that every URL that LimeWire tries to open it uses Netscape.
I have tried hunting around to find a way to have it use a different browser (for me Mozilla) but I can't seem to find it. An option need to be added to choose what program to launch when LimeWire opens a URL.. ie..
"gnome-moz-remote --newwin %u"
which will open whatever browser the user has configured for Gnome..