Ok I stumbled on a website that uses Ruby: http://www.metak.com/
And was like wow, nice, slik, pretty fast as well.

I run many sites and 1 of them is a genealogical site. We currently use a php & mysql driven application for people to search that database.

Now I was wondering what the pro's and con's are for this Ruby. The good thing is no need to refresh the page or to go to a new page. We also use a members system on that page and include 3rd party script through a php include option, so the question is as well if that is possible.

How easy is it to use, modify Ruby scripts? Does it put more strain on the site then e.g. PHP? Or should I stick with PHP? I can still keep MySQL I just read which is good.