On Twitter, I follow a bunch of people in the development arena. JavaScript framework core developers, designers, mysql/php architects, etc. etc. I'd say about 50% of the people I follow are in that arena (the other 50% probably being aggregators or tech news sites/blogs).
A consistent theme I'm finding in the past few months has been css3/html5 posts. They talk about new effects, rules, possibilities, etc. etc. Now I try to be optimistic about web development; I try to practice valid w3c content, semantic markup, everywhere I can. But the age of css3/html5, at least for me, is still so far off. 25% (at the least) of internet users are still using ie6, another 40% are using ie7; that takes us to about 65% of internet users using subpar browsers (ie7 is a step up, but still very much sub-par) that don't support anything close to css3 and html5.
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