I'll let you know later.

BBC: Reporter's log: Venice 2008

Rosen let him know in an email years later.

FORBES: Former Compaq CEO Switches To A Mac, Makes Steve Jobs' Day

Further, because the potential impact of the Kyoto Protocol on the American economy is so enormous, we owe it to the American people to let them know sooner, rather than later, whether they will be subject to the terms of this treaty.

CENTERFORSECURITYPOLICY: United States Senate

Let use know if you have a Series3 with a manufacturer date later than July 2007.

ENGADGET: TiVo HD vs. Series3 HD

Just plug it in (proprietary cables included), and a few seconds later a green light on the MiC let's you know you're ready to rock.

WSJ: A Loud and Clear Mic | Geek Chic

If you want to let folks know, just got word that the debt limit PAYGO will be signed later today.

WHITEHOUSE: Press Briefing