Hi there!
I noticed this thread and thought it might help to clarify a few things and answer any other questions.
Flex2 standard purchase comes with a variety of colors in one shade. If you purchase the Blue version you will get a variety of shades of blue. Same for other colors. The links on Snowcovered do link to the different one site for all colors and separate sites for the single color shade variations.
This isn't quite correct...
Flex (original) comes in 8 colours. If you purchase Flex you get ALL eight colours. We don't though recommend Flex when using Active Social as from our experience this module requires an XHTML skin.
Flex2 uses a different system and the colour is not fixed, you specify it yourself using the EasyMod module. So you have a choice of 16.7 million colours

. Flex2 is an XHTML skin and from feedback seems to work well with Active Social.
We have worked with a customer to integrate the message center into the skin and the edits can currently be obtained on request.
The EasyMod module supplied with Flex2 is intended for the site Admin or Host to use to customise the skin. It's not intended for the viewer of the site. You may end up with an interesting colour scheme for your site if this were possible

.
Please let me know if we can help with anything else.
Regards
James
DrNuke