I'll be honest, I actually have been offered millions for Science 2.0.  Why not take it?  Well, I had to have that discussion with my wife, as you can imagine, but it felt wrong to have called up a lot of well-known scientists and told them we were going to change how science got to the public and implemented in policies and then suddenly announce, sorry, I got a check so I am out of here.

That's not to say selling would be a bad idea but for a community like this but you want it to go to someone who recognizes its value and wants to enhance its reach or its income for writers - Google did not buy YouTube and then demand they change a lot of things, for example. because they were already huge - but at our size, mighty though we are in science audience,  we are small compared to premiere sites so anyone buying it would want to change it to make it bigger, including ways that aren't great for scientists and the audience who helped build it.

Plenty of other people have sold their blogs for millions, though.  Some we know, like the Freakanomics guys and TechCrunch, and others I had not heard of but a site called Income Diary has compiled 20 blogs that got bought for worthwhile money.

Some acquisitions don't seem to count as blogs to them - NowPublic.com and AssociatedContent.com sold for $25 million and $100 million, respectively but are instead likely considered 'citizen journalism', though that is a lot more blogging than actual journalism.

What's your blog worth?  Hard to say because people have different metrics.   My personal column is likely worth very little, as yours may be in a monetary sense, but it is the miracle of compounding that turns a few snowflakes into a science avalanche.