I once heard bloggers at TUAW get $15/post. But this was back in 2007, I'm sure it's changed since then. I suppose it also matters if someone is a contributing blogger or a full on staff member like MG Siegler and Sarah Lacy at TC
$15 would be pretty low for a major blog, I think. When I was writing for one of the larger tech blogs, I was making about $2000/month for 3 stories per day.
That's about right. There usually are bonuses based on traffic for instance, so you have an incentive to write something popular.
Generally speaking, writing is not a big money machine (unless you own the blog and sell it - it happens to one blog every other year, so don't count on it).
When I used to write (for print magazines), it paid 10 cents per character. But unlike a blog, you can only write a handful of articles per month, not per day.
