using jabber from firewalled location
Recently, due to security reasons, all kind of ports were closed at my workplace which made impossible to connect to gtalk and icq servers. I used pidgin because i could not find stable jabber transports, which was connected to icq, msn, and jabber networks - to be able to contact both people at work and friends. I couldn’t do it any longer 
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Since Internet browsing works, there are at least two ports open - 80 (http) and 443 (https). Which means i need ed to find jabber server which allows to connect on those ports. And it was easy enough - thanks to Australian jabber.org.au. It allows connections on port 443.
So, pick your favorite jabber client, register on site above and use jabber transports to connect to msn/icq/etc. Do not forget to set the port manually to 443.
Most important - have fun 
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