those many-to-many tx's look like blockchain.info's new mixer.
Yes and no. I'm 50/50 - to me it looks like all these small amounts, roughly similar value, being bundled together. For a mixer, they wouldn't all be such uniform size amounts at mixer entry layer, I wouldn't think.
Prior to this, we've had one other CryptoLock victim come to us for assistance. This was a couple of months back and, at the time, the software demanded an odd number (~3.2BTC). From this, we had thought it was aiming for USD300.
Looking at the transactions related to the ransom address, it seems CrytpLock has switched and now aims to collect a round 2BTC. Quite a lot of money really and certainly a marked increase over a three month period.