Large demonstration in Tahrir Cairo

Tweets from mobile phones with GPS turned on coming from Tahrir Square early afternoon Jan 20 2012, these indicate a large group forming in the area. 

We are seeing evidence of a large demonstration in Tahrir Square Cairo, with lots of concentrated tweeting in the area of the square.  We are getting reading on our clima.me monitor of almost 90 out of 100 right now, which is very high for Cairo.  Clearly a large crowd is there, and many people are using twitter.