Ruby on Rails

Pretty neat system. Ruby is pretty cool as a language and Rails on top of it is very high level.

Things to learn:

Ruby language features and idioms
Rails objects and conventions
Ruby Gems - there is a lot of functionality out there.
GIT - why not have source code control for myself?
Apache - its about time.
Linux - ditto
MySQL
JavaScript
Firefox extensions
PHP
System architecture

It's all free software. Amazing how far the industry has come in the last 10 years.