This morning, on the Twitter blog, they posted a notice: Restoring Accidentally Suspended Accounts. Since both Energion, and one personal account I know of have been restored, this must be the explanation.
I removed links to Twitter during this incident, since obviously our readers would be unable to follow us or comment on blog posts using Twitter during this time. These links will be restored today.
The whole thing did make me look at our FriendFeed account a bit. I haven’t used it, but it has some nice features. You may be hearing more about interaction via FriendFeed.