Opera Software could be catalogued as Standards Crazy (not always in a good way)  by many and with good reason. the other thing well known for those actually aware with what Opera Software does is that they love widgets.

David Meyer from CNET got a nice interview with Jon von Tetzchner (Opera Software CEO) about Widget Development and where does they stand when it comes to the Widget Specs W3C to be released any year now (i know, cheap shot).

Opera: Single-minded about widget development

Worth a read and proof that Jon von Tetzchner while stubborn is not as extremist (when it comes to standards) as many think.