YUI Grids CSS framework considered harmful. | Elliot Swan
Deep in the comments: "YUI has saved us boatloads of time."

@bennettpr Let me know if you need any help with the YUI RTE ;)

A Closer Look at YUI 3.0 PR 1: Dav Glass’s Draggable Portal Example » Yahoo! User Interface Blog
YUI 3.0 Preview Release 1 was made available on Wednesday, and with it we provided a look at how the next major iteration of YUI is taking shape. Among the elements we shipped with the preview is a new example from Dav Glass, the Draggable Portal, which...

YUI 3: The goals are lighter, faster, consistent, power, secure
YUI 3 has a preview release for us to check out.The goals are:lighter (less K-weight on the wire and on the page for most uses)faster (fewer http requests, less code to write and compile, more efficient code) more consistent (common naming, event...

YUI 3.0 Preview Release 1
Goal: lighter, faster, more consistent, more powerful, more securable

@tobie Ask about YUI 3's Custom Events here: http://tech.groups.yahoo.com/group/yui3/

Hope you like our new YUI 3.0 Preview Release 1: http://yuiblog.com/blog/2008/08/13/yui3pr1/ and http://developer.yahoo.com/yui/3/

@adamdotcom Thanks, I'm glad to liked the new YUI Drag & Drop example ;)

YUI 3.0 Preview Release 1 » Yahoo! User Interface Blog
A new version of the YUI javascript libraries are available as a preview release (pre-alpha). Based on the samples, it still looks a lot more verbose than jQuery, to me. Still, options are good to have.

http://www.julienlecomte.net/yuicompressor/README
average

Using YUI with the Yahoo! Maps AJAX API » Yahoo! User Interface Blog
There is a problem using the YUI libraries with the Yahoo! Maps AJAX API. This blog post describes a workaround.

YUI 3.0 Preview Release 1 » Yahoo! User Interface Blog
YUI好きなんだけど、みんなでいじる前提だとjQueryの方が日本語サンプルやリファレンスが充実しているから。

Design Stencils - Yahoo! Design Pattern Library
A stencil kit that can be used for laying out web wireframes. Download Omnigraffle, visio, pdf, png or svg.