You will know about it as soon as the update take place. This will be a world news. You should draw your attention into niche relevant backlink building and googl content building. I hope you understood.

I have heard of penguin 2.0 starting 3 days ago, but cannot confirm. There are others seeing some movement. Once again I cannot confirm but there is some chatter around.

There are like 500 Google Updates each year, pick a date....

I usually notice major updates because I will notice an unusual increase in rank on odd keywords or on a page without a reason for it. Of which I have not really noticed anything but I am looking forward to it.

Sure they are always updating...but as far as major updates, there is only a few. Matt Cutts has said the next one will be big...and then kind of danced around the answer. No official word yet though...could be a limited data set they are testing.

Would be interesting to know the industries the people are seeing movement in.

I heard that Google will update new version this week but don't know the exact information. Be careful with backlink...

Google will continue update due websites grow massive every day , just follow his TOS and never ever violate

From what I understand:

The roll-out of Penguin was just the start of that particular update. The big G will be doing smaller updates to their algorithm for quite a while until it completely levels out.

It's hard to predict what the next ones will be, but if you focus on quality content and quality backlinks you should be fine.