Please Come Back Soon accompanied by a promise of more information shortly. If you do, don’t put a date next to it because when that date is three months old prospects get a “lost dial tone” sensation, they are not sure your firm is still active. Variations that are equally annoying:
Please check back soon
Please keep checking for changes
This Page is Under Construction enough has been written about this one it’s still surprising to find it.
Confidential – Do Not Distribute useful when competitors do this, less humorous as an “own goal.”