2 days ago I was going to take a small position on Maidsafe, suddenly, they screwed things up with the IPO trough MSC and I decided not to buy in. Nevertheless, the idea is really interesting, maybe I would give them a second chance.
NXT is really promising for me. I think in this forum there is a non reasonable hate towards NXT: If the price goes up, they blame the initial distribution, if the price goes down they say NXT is dead. This is totally stupid. The IMPORTANT point is the tons of developments the devs of NXT are carry on at the moment and you can check at their forum. In 3-4 months time and if the devs continue the good work, NXT could make a killing in cryptoworld.
Finally, I should read more about Ethereum to make a wise decision.
Maidsafe didn't really screw up. They had more interest then they expected and the found a fair way to compensate people for the irregularities. The "I bought MSC and now I'm screwed" crowd has a small case, but they shouldn't take it too badly. MSC is just getting started and they are better off getting in now then in a years time.
I hadn't been fond of NXT as I'm more of a Mastercoin guy, but I'm going to give it a look along with Ethereum.
Ethereum will be interesting because it has a lot of backers. However, Safecoin was the better investment since it was priced much cheaper than what Ethereum (they wanted to raise 35m for 10% .... correct me if I'm wrong here)... further, there is a lot more technology behind safecoin that was built over 8 years.
Conceptually, Safecoin is also much better than Ethereum. The Turing complete language in Ethereum really doesn't buy much if you really think about it. Any coin can upgrade its features by adding new code.
There are two other coins that are in development that are not in this list. One I am actively involved in and another that looks extremely promising.
Best of luck investing in IPOs... very promising.