I didn't realize how Twitter had weaved its way into my daily routine until it went down. I haven't been able to tweet and read my timeline all day and I miss it terribly.
The Twitter Status page has the following message posted under the title "Site availability issues".
We are experiencing site availability issues — additional latency and errors — this morning. We’re working to address these issues.
Update: 9:07 PDT / 16:07 UTC: Users may notice that their timelines are updating slowly. All tweets will eventually be delivered.
And this is what I currently see at Twitter.com. I can't say I've missed this guy.