I'm with T-Mobile (free feature enabler) with a Curve 8320/4.2.2.180. Using MidpSSH 1.6.0 I can append the following to the host:port in order to connect (all on one line, including spaces, without the quotes):

For instance, if I want to connect to 192.168.1.2 on port 22, I would enter it this way (again, all one line, including spaces, without the quotes):

Here's where I found this:

Wi-Fi Connections! « BlackBerry Developer SideShow