A bit late, but packages for Ubuntu Raring (13.04) have been added to the stable and devel PPAs. I’m not on 13.04 yet, so I haven’t tested FS-UAE there yet, but I don’t have any reason to suspect that the packages won’t work
FS-UAE focuses on emulating Amiga games using the accurate emulation code from WinUAE. It also has features to emulate a high-end Amiga with expansions.
Unique features for FS-UAE are support for online play on all supported platforms and an on-screen GUI controllable with keyboard and gamepad controllers.
A bit late, but packages for Ubuntu Raring (13.04) have been added to the stable and devel PPAs. I’m not on 13.04 yet, so I haven’t tested FS-UAE there yet, but I don’t have any reason to suspect that the packages won’t work
The FS-UAE project has its own domain name now: fs-uae.net
http://fengestad.no/fs-uae/
). Please also let me know if you find an old URL which is not redirected properly.
An update to FS-UAE 2.2 has been released. Changes in FS-UAE 2.2.2:
An update to FS-UAE 2.2 has been released. Changes in FS-UAE 2.2.1:

Screenshot of FS-UAE launcher, which is an optional part of FS-UAE providing many new and convenient features!
I am pleased to announce version 2.2.0 of FS-UAE, the multi-platform Amiga emulator for Windows, Linux, Mac OS X, FreeBSD and OpenBSD! FS-UAE 2.2 can be downloaded here.
Notable changes since version 2.0 include:
Please see the release notes for more information about this release and a detailed list of changes. Also, many thanks to translators, contributors, and everyone who has been testing the development versions and reported bugs and issues!
A list of contributors is available. If you wish to donate to FS-UAE development, I have set up a donation page via PayPal.