All,
After much thought about why Tiscali will not allow Limewire to work I determined that it is because they are blocking all port apart fromt ftp, http etc... which is true for the most part.. except there are some ports still open as others have said, what Tiscali have done is to stop incoming ports but not stop outgoing ones, so if you do the limewire test and goto :
http://www3.limewire.com:6346/
the site will display, but if you go to a port testing website and test that port on your computer it will be blocked from allowing incoming data through that port on Tiscalis servers.
So go to:
http://www.auditmypc.com/security-scan.asp
and in the third box down you can select the range of incoming ports to scan your computer for, try each range and then when you find a warning that says a port is open on your computer use that port number in Limewire, Firewall Listening port box. (don't use port 80 though as it will be in use already if the website shows that port)
I've just done this and it showed that Tiscali was allowing ports 4443 and 5190 and 5566 were open, now I can connect again.
Regards,
Dan