"Quote: "RSS is the first working example of an XML data network. As such, and in this world of learning objects and metadata files, RSS is the first working example of what such a network will look like for educational designers. Just as news resources are indexed and distributed in the RSS network, so also educational resources can be indexed and distributed in a similar learning object network."

Comment: Nice article on RSS (Rich Site Summary)...timely as well - currently at RRC, we are trying to create a culture of bloggers...and use aggregators as a means of accelerating the reading process. RSS is already popular in the blogosphere and news sites. Stephen Downes extends the role of RSS from that of news aggregation to learning object network (which he contrasts with current LCMS models)." [elearnspace blog]

I'm all over Daypop and Blogdex, but I haven't heard of Popdex: The website popularity index before. It looks like it's just getting off the ground, with XML feeds to follow at a later date. No "about" page. Something to check back in on someday.