I will take a look at the Nordic nRF24L01+ modules considering I already have some. I was hoping for a one-chip solution that could provide mesh networking of hundreds of nodes that cost less than $6 per node, since each node only has to measure a an analog value.
The Jeenode does not fit this requirement. Ironically, they wanted to provide a product that is not overkill, but didn't balance their equation right. They replaced the very nice Xbee with a bare radio antenna, which leaves you to implement all communication in software. They should have reduced both the microcontroller and radio module, but instead they axed both price and nice features of the radio module.