I'm confident that the smart people at Google will do the smart thing and put RSS in Gmail.

From Google's Brin Talks on Gmail Future:

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It was interesting to me that you did finally hit on the word conversation. It seems to me that there's a synergy between the elements of the conversation in the RSS space and what you're doing in the e-mail space.

I think that's very true. Part of the things we've seen why blogs and RSS feeds are such a success is that you can actually read it—you don't have to stop, click back and forth, collect bits and pieces here and there—but it is all presented to you as one.

And that's what we've aimed for in the conversations as well, because I don't want to have to hunt and peck around to get the different pieces of the same conversation. I want to be able to see it all at once.

UNQUOTE