Here's a list of links on cloud, .NET, Node.js. Ruby, and more.  Hopefully you will find them useful and informative.

Cloud

• Scaling up and out in Windows Azure Web Sites: How to start small and scale up and out while keeping costs down.

• Windows Azure internals: A video from TechEd Northamerica.

.NET

• Cross-platform portable class libraries: A good rundown of portable class libraries and why they are important.

Node.js

• Node v0.10.13 released: Another week, another Node.js release.

• NodePDX space wizards: NodePDX is over, but you can find videos and extra swag here.

Python

• Reactive extensions (Rx) for Python: And Ruby.

Ruby

• Build a Sinatra MVC framework: Using Sinatra for MVC.

• Introduction to Railties: A good read about rails internals.

• MRuby: Continuing the trend of "JavaScript is the new assembly", here's a Ruby interpreter in JavaScript.

• The self-pipe trick explained: Handling signals by using pipes.

• Reactive extensions (RX) for Ruby: And Python.

Mobile

• Samples & tutorials for Windows Azure mobile Services integration: A collection of C# and JavaScript samples and tutorials on integrating Mobile Services with other services.

• Windows Azure powers for mobile services and mobile gaming: Two posters/infographics from Build are now available on the download center.

Misc.

• Riak 1.4 is out: New version is out.

• haste-compiler: Haskell to JavaScript compiler.

• 16 JavaScript concepts JavaScript Professionals must know well: A bunch of things that are useful to understand if you're using JS.

• Building Windows 8 applications with AngularJS: This is why Win 8 support for HTML/JS apps rocks.

• Why curry helps: A good article on currying in JavaScript.

• Angularytics: Analytics for AngularJS apps.

• Ember.js persistence foundation: An alternative to Ember-Data.

• Grunt-notify: Grunt notifications sent to the desktop using Growl, Notification Center, and Notify-Send.