I think it should be noted where each case is acceptable.  If there is time or allowance for disruption you should most definitely chase newer technologies.  If you're in a maintenance mode (just fixing bugs, cleaning up, etc) or you're writing pieces for a long term application, it seems better to use technologies proven before in the company.  That doesn't necessarily mean they can't be a little bleeding edge, just that they should probably be used in a prototype or other application first.  It's about growing the company's repetoire in the right stages.