We just launched an update of the Blueprint SDK. The new sdk.zip contains:

• an updated Blueprint Developers Guide
• an updated blueprint.php helper class with a bug fix related to the location-chooser
• a Quick Start guide for developers who are new to Blueprint
• a guide to the location-chooser control
• an article (adapted from this blog) that provides *guidelines for designing Widget icons

The new documentation will help you to understand the complex location-chooser control. The Quick Start will give you an overview of Blueprint and help you with the Twitter example that comes with the SDK.

Especially if you are working on projects that use location-based services, we encourage you to download the updated SDK from: http://mobile.yahoo.com/developers/download