No word from Hany or Henry the internet is down so I am not anticipating any news from them yet.
I am sure they are safe Cairo is HUGE and the demonstrations are located in a small area. If you stay home you would be okay.

However, this is wrecking Egypt's fragile economy and will create havoc for the tourist industry which is their livelihood. After things settle down the situation remains to be seen. The long term effect for many Egyptians and particuarly those in the tourist industry may be quite serious.