You can compile it yourself from the Source Code available in the official webpage OR wait for playdeb to have it ready which takes a couple of days.
Here is the link http://www.playdeb.net/software/Hedgewars
And the steps are:
- Go to : http://www.playdeb.net/updates/ubuntu/10.10/#how_to_install
Follow the instructions there.
- Go to: http://www.playdeb.net/updates/ubuntu/10.10/?q=hedgewars
Click on Install this Now
Wait for it to install then go to the Main Meny -> Games
Of course adding the PPA from playdeb will notify you when the latest version 0.9.15 comes out and you can update like you normally update any other program.
you can help playdeb by notifying the Devs over there that HedgeWar 0.9.15 has come out so they can start working on the deb version as soon as they can.