Widgets ecosystem

Allright, widgets are the new rage. Here are your options:

• Mac Dashboard Widgets: the OG of widgets; Google has a few too
• ...copied by MS in Vista: Windows Sidebar Gadgets
• Google Gadgets: desktop or web
• Yahoo Widgets: desktop, within the yahoo RT
• Opera has its own which work on the desktop, mobile phone, or Tv (have to see this one!)

Then there are the 'social sites' plug-in widgets (eg for Facebook: Washington Post's collection of widgets). Also, offerings such as this one that provide the backdrop for widgets to work. Or, for a really useful collection of widgets, look here.

Finally, there are aggregator sites such as these: WidgetBox and SexyWidget.

A cool company that authors widgets.