Ask HN: Suggest the keynote speaker for my web conference

I'm the organiser behind http://allyourbase.com and I am planning the 2013 version.

The idea behind the conference is a Database conference for web developers covering client side databases, NoSQL and traditional RDMS.

I'm on the look out for suggestions of people who could deliver an interesting "keynote" talk. The headliner if you like :)

In 2012 we had Monty Widenius the creator of MySQL deliver the keynote.

Names I've thought of myself, to give you a flavour.

    Werner Vogels (Amazon CTO)
    Martin Fowler (ThoughtWorks and well known tech author)
    Hilary Mason (Bitly Chief Data Scientist)

I'm looking for more names to add to that list. If you do suggest a name, a url to a website or twitter handle is also handy so I can figure out how to contact them.

Thanks in advance for your help!