These are some of the best RSS feeds I've found for keeping up with HTML5. I'm doing jQuery & MVC development as well so you will find the links have a jQuery/MS angle to them.
The oh-so-necessary caniuse.com, in RSS update format: http://feeds.feedburner.com/WhenCanIUse
Rachel Appel's blog
Really high quality articles with a focus towards the design side of the web development picture
No surprise - the focus is on IE10, but it is really a great resource for new browser tech.
Joe recently switched from MS to Mozilla. New job but he still puts out great Weekly Links summaries.
The Big Web Show
A podcast covering web development & design topics
Elijah Manor/Web Dev .NET
I'm cheating on this one a little bit. Elijah is a fantastic JS & web development resource. He has a site at Web Dev .NET
, but honestly these days you are better off following him on Google+
...and you can of course sign up to follow the W3C
as well, although I don't think there is an HTML5-specific RSS feed.