Yes, we're adopting it too, and it will be in the next weekly build. Thanks to www.feedicons.com for making it so easy! Oh, and in case you haven't seen it before (what are the odds.. ), I've attached a large version to this post which you can make love to.
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Anche Opera ha annunciato l'adozione dell'icona per identificare i feed, implementata come standard da Firefox prima e Internet Explorer poi.