Yes, it's true. Feed Digest is moving to significantly faster servers, and it's all starting in the next 30 minutes. The moving plan has been designed so that service is not interrupted at all during the move except for:
1) The Feed Digest control panel will be unavailable for up to 30 minutes.
2) Updates on feeds will probably stop for up to 30 minutes.
Actual serving of digests, etc, should be unaffected as we're keeping both systems running as they switch over. Report any problems here or in the forum ASAP though!