Twitter down

Noticed that Twitter has been down for a couple of hours now. I have no idea what happened. It went down after I had just crossed my landmark (or should I say web mark) 1000th post (or Tweet as it is known in Twitterspeak).

The Twitter Status blog just said:

We are determining the cause and will provide an update shortly.

A later update informed that they were defending against a denial-of-service attack.

Hope they solve the problem soon. So many Tweets have come up in my head and gone.