I wanted to try Railo so I installed it on Ubuntu laptop. Thanks Mark Mandel for a short blog over here http://www.compoundtheory.com/?action=displayPost&ID=393.
I didn't know what to put for mail server in Railo admin, and it kept asking for it for cfmail tag when trying to load a site. Ended up installing postfix from instructions here http://my.opera.com/Contrid/blog/show.dml/478684.
The menu for settings is a little strange, old school, and I mean old school looking. I chose "local setup" in the first menu. Use arrows to move around selection choices and Space to select. It worked in the end and "localhost" was recognized as a mail server in Railo.