Good news for OS X users: Priit Haamer provides documentation for Ruby 1.9 and Rails as dictionaries for Dictionary.app, which makes them searchable by Spotlight (Ruby documentation, Rails documentation)!

There also was a nice discussion over the last few days on Ruby’s Most Underused Keyword, which is quite an interesting read (make sure you don’t skip the comments).

Last but not least I want to point out isitruby19.com, a website that tests gems for their compatibility with the newest Ruby release.