on AIR Bus Tour Boston: Yahoo and Adobe AIR
j r conlin gave a talk about What can Yahoo! Do For You?
Yahoo Developer Network provides lots of tools, largely free to use, with Flash/Flex specific content. These include: Maps, Search, YUI, Flickr, del.icio.us, Upcoming, Pipes, MyBlogLog, BBAuth, YSlow, Astra, etc.
YUI: Lots of widgets that you don't have to build. Calender, grid, etc.
Pipes: RSS type mashup capabilities for non programmers.
AirMail: Drag and drop mail application written in AIR (not public yet).
Astra: YUI for Flex developers, BSD style license.