Your blog is disabled
"Blogger's spam-prevention robots have detected that your blog has characteristics of a spam blog. (What's a spam blog?) Since you're an actual person reading this, your blog is probably not a spam blog. Automated spam detection is inherently fuzzy, and we sincerely apologize for this false positive.
We received your unlock request on March 23, 2007. On behalf of the robots, we apologize for locking your non-spam blog. Please be patient while we take a look at your blog and verify that it is not spam."
As you can see from the message (This was confirmation after I already notified them), Blogger is now aware of this mistake. I've had this happen once before with Blogger and the good news is that it took them less than 24 hours to unblock the site.
Anyway, for those of you using the exercises on the Learning 2.0 site, I send my apologies. The site will back online soon. I can only assume that this is the price of being profiled in LJ as a mover & shaker, for the usage of the site has spiked dramatically since the issue came out.
BTW: It looks like you can still get access to the About page and the list of Things. But the links to the main blog are still blocked - at least unitl Blogger figures out their mistake.