ITA is known in lisp world for being a proud user of lisp in software development world, and contributing to existing lisp projects (from SBCL to slime). They’re also vocal about lisp use in today’s most complex problems (low fare search engine is one of their business) so they’re widely respected.
They will be publishing generally purpose libraries and utilities. No Airline Industry code will be published.
Update: ITA has changed the project name, more information in the following post.