For a while I have been using TweetDeck on my XP laptop to interact with Twitter. However I also have a ubuntu desktop which I commonly use as well; so I set up looking to see what Twitter clients there were for ubuntu. After a slightly fruitless search I stumbled back upon Adobe Air (which is what TweetDeck is developed using).
Could you install Adobe Air on ubuntu I thought? Sure came the answer.
david@george:~$ wget http://airdownload.adobe.com/air/lin/download/1.5/AdobeAIRInstaller.bin
david@george:~$ chmod a+x AdobeAIRInstaller.bin
david@george:~$ sudo ./AdobeAIRInstaller.bin
That will get and install Adobe AIR on ubuntu
david@george:~$ wget http://www.tweetdeck.com/beta/TweetDeck_0_21_5.air
I couldn’t find a command-line way of installing an Adobe AIR application, so the simplest way is to double-click on the .air file and install it through the Adobe AIE Application Installer. However once that is done, TweetDeck sits proud on the desktop and works! Yeah!

to install air app from command line: execute “Adobe\ AIR\ Application\ Installer ”
-syed
When I tried that – it just brings up the AIR installer UI, I was after a way of installing without opening the UI.