My responsibility on the Firefox team is to support internationalization of Firefox. One of the things I do is review international locations for choices on product elements such as search engine, RSS feeds and RSS readers. The objective generally is, of course, to provide the best user experience by creating choice across these elements.
Defining the "best" in each locale is often difficult for me as my context is limited to the languages I speak and geographic locations I've lived. In our upcoming major release of Firefox 3 we will be adding capabilities for protocol handlers. As such I'm looking for help in finding good sources of information on international choices for RSS readers and feeds and search engine's. There was some good debate in the Mozilla L10n (localization) Forum on Google Groups, and there are some great bugs (much as bugs can be great ;) that illustrate the challenge of finding good choices. I hope you can help me find good sources e.g., lists of international choices across these product elements.