For Europeans wanting to try it, check out Joylent[1] as well, a Soylent fork based in Netherlands. They do a few different tastes too (vanilla, strawberry, banana, chocolate and soon mango).
I must say though, their videos make me a bit worried, I can understand they are trying to make them fun and entertaining but to me they just come off as unprofessional.
[1] http://mana.menu
So, I have been drinking Ambronite [1]. It has a similar idea, but it is a bit more expensive, because it is made of real food ingredients.
> Although human toxicity data is unavailable, animal studies have shown that chronic ingestion of more than 10 mg/day of molybdenum can cause diarrhea, growth retardation, infertility, low birth weight and gout
According to the Joylent website. One bag of Joylent contains 207µg of Molybdenum. So if my math is correct (and the animals tested in that study behave the same way as humans) then you would need to ingest about 37 bags of Joylent per day to reach that amount. Perhaps it would be a good idea for them to lower the amount of Molybdenum, just in case.