If you ever want your client to be packaged by Debian or Ubuntu, you should make sure the licence you pick is one of those they class as compliant:
http://people.debian.org/~bap/dfsg-faq.htmlIf you pick one of the compliant licences, you're pretty open-source friendly in general.
Tim
--
The Wellcome Trust Sanger Institute is operated by Genome Research
Limited, a charity registered in England with number 1021457 and a
company registered in England with number 2742969, whose registered
office is 215 Euston Road, London, NW1 2BE.
--------
List info:
http://lists.bestpractical.com/cgi-bin/mailman/listinfo/rt-devel