FunCom has announced that Early Access sales have been sold out in in North America, and for the most part Europe. FunCom had originally allocated only a limited amount of users to opt into the Early Access program and apparently the demand has exceeded their expectations. As such, the programs capacity has been filled as of Wednesday, May 14th.

Since the announcement, Senior Community Manager Oliver "Tarib" Kunz has followed up with an additional statement regarding the development:

We measured how much capacity we thought we would need for this program and registrations have been on pace for this capacity - until two days ago. On Monday the registrations spiked and on Tuesday they increased even more. Early on Wednesday the capacity limit was reached and automatically shut off. The entire program is now mostly sold out globally, with some local variation. We had no way of anticipating the spike we saw at the end.

The official announcement can be found here and you will find Tarib's follow up comments at the official boards.