Well, that was a surprise...

Things I didn't expect to see in my inbox when I checked my e-mail a few minutes ago:

Thanks for being a loyal PlayStation Underground member.
Because of your dedication and enthusiasm, we're inviting you to
be part of the very select group to beta test LittleBigPlanet.

I'm downloading the beta as we speak, and will of course give this game a whirl very soon. It's one of the entries on my as of now unpublished list of "Most Anticipated" Playstation 3 games for this fall and winter. My girlfriend may be more excited for this game than I am, which is saying something, so she'll have a neat surprise when she wakes up in the morning.