Got midpssh (http://www.xk72.com/midpssh/index.php) running on my blackberry, but it required setting some magical settings to get it cleared for full internet access. Fortunately, documentation is good and pointed me here: http://www.blackberryforums.com/blackberry-network/2185-blackberry-internet-msn-chat-web-telnet-tcpip-no-bes.html

I’ve got it working to dreamhost.com, but not to the iMac at home. That is probably a problem with port forwarding more than a problem on the blackberry.