I ran a search and found nothing on this, likely due to the fact this is so new.
Please save the "nothing beats real/whole food," we all know that. I would not recommend anything as a full-time meal REPLACEMENT, but this looks like it might be a decent 2nd choice for someone on the go who needs to add some calories between real meals and possibly even replace a meal sometimes. They are touting it as a full replacement and that you can stop eating real food (which I would not recommend).
Personally I have a job where I am on the road most of the day and it is extremely hard (not impossible) to pack a cooler full of good food for the entire day. In addition to being in the car, my schedule is impossible to estimate so lately I have had a lot of skipped meals and fast food just for lack of time (I have no shame!).
If you have a minute check out their website: Soylent - Free Your Body
I have to admit, as much as I have always talked bad about meal replacements this actually interests me. I was wondering if you guys have heard about, or even tried it. I would love to read a review from a real person as opposed to someone in the media!