are we having a black friday sale in the cash shop this year?

We won't know for 100% sure until Black Friday, but, it's highly likely there will be one of some degree. :)

i hope they do then ill put about 50$ on here lol

Yes, there will be.

do you know when they announced it?

Keith said so in the forums. With the forum search down I cannot give you a link, but he definitely said that there will be a sale.