Any "Group" in THWACK has the ability to handle email digests. The THWACK MVP Space is no exception. The email digest is a scheduled email with summary information about that group.
To enable or disable the Email Digest for a group, in the right-rail click "Email Digest Options."
Choose either Daily or Weekly as you wish.
Note: All digest options are not setup for all groups as of yet, but it won’t hurt to select it early so you’ll be “in the know” when this feature is fully enabled.