Yes, April 15th - these sites were 'siezed' for 'illegal' gambling.
Anything that will effect the profits of the Indian casino's or various cities (Vegas, Atlantic City, etc) and not good for making revenue will be shut down. However, pretty much once they agree to pay taxes or money, they will be back up.
Question is, if they are in a different country, can the US shut them down, or just block their ip into the states?
Is playing online poker just as illegal as playing a high stakes poker game in your home?