Update (12/21/06): I was in a pretty upset state of mind after struggling with a barely-working comment system for many days when I wrote this posting. I didn't want to take my frustrations out on Typo because I liked Typo (plus, I really didn't think this was Typo's fault because Typo worked fine under light load), so I picked on Rails instead. Please read this posting as a silly angry rant rather than a well thought-out criticism.
It wouldn't be fair to judge the venerable Ruby on Rails "platform" based on a single data point (*cough* it sucks! *cough* *cough*), but after days of agony trying to get comment submission to work properly in Typo (executing an INSERT after an HTTP POST must be a requirement that's outside of Rails' "scope"), I decided to go back to my roots and run this blog on Wordpress.
(Yes, I was tempted to write my own blogging engine in Erlang, but I decided against it -- I must keep my eyes on the prize :) )
Based on my admittedly limited Rails experience, even if Erlang isn't your cup of tea, I recommend avoiding Rails and sticking to PHP or Python (or Smalltalk, about which I hear nice things) unless you're an optimization genius who loves the thrill of Linux tinkering; you're hopelessly stricken by a successful marketing blitz; you're a masochist; you wrote a Rails book; or you're just not planning on success.
I can't comprehend why some people think it's justifiable to ask someone how many worker processes he would like to run. I wouldn't want to pick a low number like, say, 5, because that might indicate that I have self esteem issues, but then I'm trapped by the fear than an astronomically high number such as, gosh, 20, would hose my VPS.
Sometimes, when I let my imagination run wild, I wish I could say something crazy, like "500,000".
Oh wait -- I can :)
Update (11/2): Wow! Wordpress is so much faster than Typo! Good job, Matt! :)