building your own Ambient Orb
You might have seen ads for the Ambient Orbs . They are basically a pager on the FLEX protocol with a bunch of leds attached, changing colours with the weather forecast, the phase of the moon, the traffic or the NASDAQ.
The interesting thing is that on the company's web site, there is a page on how to build your own. This is where I found that there are some data only FLEX pager, certainly with a serial port.
On the same web site, there is a mention of the Ambient Energy Orb developed for DemandResponse (this one is not wireless though....) Potentially interesting combination ...