Jetty and tomcat

[lostinignorance]

So, I guess I can't seem to find this referenced anywhere in the forums on here. I find it elsewhere on people forking the project, but not here.

The about screen on the localhost website shows jetty as version 6.1.x Jetty looks like they're up to version 9. Is subsonic not up-to-date?
Also, on that note, what tomcat version is this running on?