The comments function seems to be broken on blogger - at least for me and for several other friends.
I can not post comments to my own blog nor to many of yours - I'm reading, and e-mailing when possible. I've reported this to blogger, but... we'll see.
Blogger folks - if you're having similar problems PLEASE report it!
UPDATE: There's something on blogger about changing the commenting format and if you go to settings and save things as "embed" then it will work.
It didn't for me, even following directions.
Here's what DID work.
I went to settings, changed my comments preference to the "pop-up window" option, and now everything's hunky dory, except for the fact that I now have to use the pop-up window option. But I can live with that.