Copio aquí el email que he recibido avisando de la disponibilidad del nuevo cliente de BM: el que quiera ya puede ir creando su avatar :-)

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Dear Blue Mars Player,

The newest version of the Blue Mars Client (Version 0.0.4883.2) is now
available for download!

In order to log into the new Client, however, you will need to re-create
your Blue Mars Player account, even if you have previously done so.

Please follow the steps below to re-register.


RE-REGISTERING YOUR BLUE MARS PLAYER ACCOUNT:

1. Go to  https://www.bluemarsonline.com/game/WebRegistration.html

2. Enter the following information:

    Email Address (THIS WILL BE USED TO LOG INTO BLUE MARS)
    Date of Birth
    Country

3. Click "Next."

4. Read and accept the Blue Mars Terms of Service.

5. Click "Register."  Follow the instructions on the following screen to
go to the Account Activation page.


WHAT'S NEW IN THE PLAYER ACCOUNT ACTIVATION PAGE:

1. Create User ID:  This will be your unique identifier inside Blue Mars.
IMPORTANT: The User ID will be unique and cannot be changed, so please
choose carefully.

2. Create Avatar Profile:

    Avatar First and Last Name: These are now optional.  This name will be
displayed in Blue Mars along with your User ID.

    Avatar gender:  This is not optional. However, you may change your
avatar's gender in the Player MyPage, which will be released soon.

3. When you click the "Activate" button, the download should begin
automatically. If for some reason the download doesn't start, you can
click on the "Download Client" button on the Account Activation page or
follow the link below:

http://www.bluemarsonline.com/BetaClientDownload/ClientDownload.html


...and that's it.  Please refer to the following links if you have any
problems or questions about the new registration process or the latest
version of Blue Mars:

Blue Mars Player Forum:
http://www.bluemarsonline.com/forum/

Email Blue Mars Support:
support@bluemarsonline.com


Best regards,

Blue Mars Support