CNet:
Jabber sells proprietary instant-messaging software–both the software application people use for online chat and the server software needed to route the messages over the networks. Until now, its server software worked only on Linux and Solaris, Sun Microsystems’ version of Unix.
Excuse me? Proprietary? I guess they mean that it’s closed source. It is by no means ‘proprietary’ though. It fully complies with the Jabber/XMPP specs, which are a bajillion times less ‘proprietary’ than pretty much any other IM protocol in existance.
Maybe ‘proprietary’ is a corporate buzzword that makes it more attractive than that hippy ‘open source’ stuff. I’m not sure.
More information can be found in Jabber’s press release. Of course there is an official open source server implementation as well as a list of jabber server implementations. Gobs and gobs of information can be found at jabber.org.