This question is for all the gurus out there. I am very comfortable using FW for my site, but I am wondering if I should expand my knowledge-base by learning a new language. Which language would you think is a best choice? I have programming experience from 25 years ago so I am not a total rookie.
It all depends on what you think you are going to be asked to do sitewise in the future.
If you think that dynamic sites might be useful then PHP and MySQL . But I probably wouldn’t jump in too deep without some requirement because there are a lot of off the shelf solutions out there.
I would take a long look at JavaScript. That will give you a lot of opportunity to make a big difference in your sites. If you do, definitely use a framework. I recommend http://prototypejs.org for its close coupling with Freeway, and also for its sensible design internally – you can learn a whole lot by reading it’s source code.