ROMAHONY  The download is a .sitx thats all you need to know :/ Sure a dmg or zip would be too easy.  
(Version 2.30)

ROMAHONY  Seems over the top for something that doesnt save much time. I created a script that checks out your source compiles it, checks if it compiled correctly, puts it in a dmg that can be used for sparkle and uploads it to your webserver, posts the build info to a db also. I have been using this for sparkle for months, with mine you can do nightly builds with cron or even have a commit hook for development.

http://www.ruairiomahony.com/portfolio  
(Version 1.1)