[23:43] Well ... it is possible to install and run ConnectBot on a Chromebook, but at least in the default settings it does look ghastly. But in contrast to the SSH client found in the Chrome web store this app has built-in support for pubkey authentication.
Update: Forget what I wrote before. Using it in a maximized window with a larger font size makes it actually usable. Only downside is that the app for some reason defaults to a US keyboard layout with no apparent means to change this.