Any noteworthy changes on 5.5 overall? I'm happy the language is moving forward with a seemingly faster traction than before (github effect?), but I haven't heard of any game changing feature getting implemented yet since quite a while. Still waiting for a object literals syntax myself.
The new changes I'm looking forward to are the password hashing API, scalar type hints and generators.
I'm also looking forward to 3 things that AREN'T going to be there: register_global, safe mode, and magic_quotes
There is a PHP 5.3.7+ implementation of the password API here: https://github.com/ircmaxell/password_compat