It's hard not to get excited about this many relays, especially when they're optically-isolated and individually controllable.
All 16 relays are rated up to 250VAC or 30VDC and 10A, so you could do some serious (or not so serious) home or lighting automation!
And if this isn't enough relays for you, multiples of this board can be added to any mainboard! Screw terminals allow for secure connection to each of the relay lines.
 

Microsoft .NET Gadgeteer is an open-source toolkit for building small electronic devices using the .NET Micro Framework and Visual Studio/Visual C# Express. This module is designed to quickly and easily integrate into any .NET Gadgeteer project.

Dimensions: 198mm x 90mm

Includes:

• Relay ISOx16 Module
• Gadgeteer Cable

Documents:

• Tutorial
• Gadgeteer Site