Everyone needs to chill.
The recent changes were based upon sites that used or were found related to "backlink networks" - usually large private blog networks.
If you use a private blog network, a service that you had done used a blog network to rank you, or your site was associated with a blog network in some form, then you were affected.
Now...
To my knowledge, none of these sites were de-indexed, but were just hit with a keyword ban.
They did this in a "wave" or a "blast". Meaning that it's not part of their algorithm. They did it this way so that you are not able to bowl down your competition. And they will continue to do this as needed. So I would highly recommend staying away from any services that are offering "private networks" as part of their backlink strategy.
With that said...this is probably what is going on...
1. BigG hit your site(s) with keyword bans
2. These bans are set for a period of time rather than indefinitely
3. You site will be seen as a "potential threat" for an extended period of time due to this
4. This is not indefinite, so your sites will show back up again. However, don't count on your rankings being anything short of crap.
5. Use web 2.0 sites and video sites to sell your "stuff", in the end this will also rank your "money sites" when they come back online as well. BigG is giving high priority on these area's at the moment, so take advantage of it.