There's a lot of bloggers on Gaia, you just have to look for us. Heck, I've got a link to my blog in my sig in case people are interested. What kind of bloggers are you looking for? That might help you narrow your search a bit.
I know that one Gaian, "Cogent Dream" I believe, has a link to his blog on his signature ('The Sceptical Prophet). I read it myself sometimes, and I like it. Other gaians with blogs are:
The Phoenix Rises Again (I think. It's either her or 'Saffron Bunny', or both. I'm not sure. They have the links in their signature if they do, though).
And... Sir Icehawk, don't you have a blog too? Meh, I'm confused.