[spindritf]

This has many cool features and is easy to use in scripts but if you just want Twitter in your terminal, check out Twirssi[1]. It plugs into irssi which many have running already anyway.

[1] http://twirssi.com/

[Foxboron]

Using bitlbee for this is awesome aswell. Then you don't need to run several scripts for more functionality (g+, Facebook, jabber etc)

[sc68cal]

The problem with Bitlbee is that it does not support twitter lists. I had a project to add that support, but my C is very rusty :(