I just wanted to chime in and say I'd be very pleased to see SecureCRT add Mosh (http://mosh.mit.edu
) support. I travel a lot and end up on cellular or generally slow connections with high latency. This makes even the most basic tasks on SSH incredibly tedious and difficult.
I've been using Mosh on the command-line, as it's an out-of-the-box replacement for ssh (it runs both client and server-side), and it makes my life a lot easier. Other SSH clients have added Mosh support (such as the iOS client "iSSH") so I'm assuming (and I may be wrong) that it isn't too difficult to add a Mosh protocol with a slightly changed version of the SSH protocol.
Technical information here: http://mosh.mit.edu/#techinfo