My company is so firmly entrenched in Java the only reason Rails is not completely dismissed is that one of the senior technical gurus sees its potential (and likes it).

The only reason I can see that there isn't "Learn Rails in 5 days" training for $2,495 is that there is not a market for it yet - since the managers don't want/need Rails programmers there is no need for over-priced training. And from my experience, you can't being to touch on Rails in 5 days. Even if you could, after the 3rd day, your brain becomes numb.

Remember, Java is safe. Java won in the Enterprise. Who could have predicated whatever percent of SMBs and Fortune 500 companies would have Java running every which where? Rails is a big step out of Java programmers comfort zone.