Whats an Electric Imp?
It's a Wifi connected processor in a super small package. Check the website for more information - Electric Imp
I purchased the Sparkfun Serial Enabled 16x2 LCD - Black on Green 3.3V to go with the setup.
Here are the hardware and software notes on making it all work.
The Breakout board shown here is dubbed an "April".
Note: This Instructable assumes some basic knowledge of working with an Electric Imp. I have included links to some good resources if you are brand new to the Imp world, but the focus is on getting the LCD working, not teaching the Electric Imp from scratch.