It's quite common for startups to have 1 or 2 sexy (and well-enough engineered) projects involving your favorite technology X, to run up the flagpole at conferences or in job ads, etc. But like as not, 80% of what they do (and of what you'll be doing as a developer there) is the same half-baked, post-"blitzkrieg" mop-up work you'll be doing pretty much anywhere else.
They were pretty straight about that: Java, ExtJS, stored procedures. Not exactly candidates for the sexiest development tools alive. They were pretty honest about that, no "this will look awesome on your resume" tomfoolery.
It was a pretty great interview, and I almost took them up on their offer. So don't get me wrong, I neither want to praise their stack nor put it down, I just thought that their ubiquitous use of stored procedures was an interesting fact (and Postgres with its pluggable languages supports this pretty well, these days you can even put your js/v8 code in it, if you really want to JavaScript all the thigns).
