Elsewhere

DevX.com has published a great article by Mark Watson entitled "Ruby Programming Language Enables Concise Network Programming". Mark gives quick rationales and examples for:

Flickr.rb is an 'insanely easy' Ruby library to interface with the world's most popular photo-sharing service, Flickr.

Mauricio Fernandez's ever-mindblowing Eigenclass presents a great article about how to easily implement a plugin system for any Ruby application. Ruby's reflection and OO features make it a cinch.

Paul Cantrell has created a cool guide, with demonstrations, of the powers, quirks, and surprises of closures, blocks, and procs in Ruby. He writes:

Sending mail from Rails applications using sendmail or a normal SMTP daemon is easy, but GMail has posed some problems. Luckily, someone has worked it out and presents code on how to get ActionMailer sending through a GMail account.

I initially thought there was only one PayPal library for Ruby, but apparently not. Here's all those I've found:

The unstoppable Coda Hale presents an amazing article about setting up a server with Mongrel, Apache, Capistrano, SSL support, etc. for solidly serving Rails applications. An extremely well written and solid guide.

Tim Hunter, of RMagick, the Ruby Image/GraphicsMagick library, has put together a cool tutorial about how to use RMagick to produce Web 2.0 style graphics, as shown above. It's pretty in-depth.

If you want to cut down on the nastier elements getting through to your Web site, filling in contact forms, and generally causing havoc, consider the rbl_check plugin by Joost.