If you're interested in Haskell then yes it is a good presentation. In my opinion, Bryan is one of the more thoughtful speakers around.

Slides are here: http://bos.github.com/strange-loop-2011/talk/talk.html#%281%...

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He had a similar/same talk about a month prior and here is the video on Vimeo if you're not a fan of InfoQ's format:

http://vimeo.com/27192476 (Bryan O'Sullivan - Building Solid Distributed Applications with Haskell and Riak)