In the meantime, please check kei_san77-san's great report from CLAMP's appearance at the opening of their exhibition here.
Here's a video with Mokona shot by me! They were all extremely nice and polite to everyone, as you can see from the video.
I've met some few LJers already and it has been great, here's hoping that I shall meet a few more of you!
EDIT: Here are two more videos. The first one is from CLAMP's arrival to the place and the second one is after they came out of the building where they were interviewed by three local TV channels, and they kindly spoke to everyone who was waiting outside for them.