I've just uploaded iftop 0.16. You can get it from:
http://ex-parrot.com/~pdw/iftop/download/iftop-0.16.tar.gz
Changes are:
0.16 28/02/04 * Added support for DLT_NULL * Fix for pthread.c behaviour on Solaris.
* Build fixes for gcc 3.4+ Henne Vogelsang hvogel@suse.de
* Fixed behaviour of -n and -N options Klaus Sperner klaus@heaven.escape.de
Paul