Here's a little more info (although no datasheet) : 
http://www.microchipdirect.com/ProductSearch.aspx?keywords=ZG2101MC
They're part of the Zero-G project and pretty pricey.  You might also 
look at the AC164136 development kit for the Explorer 16.  I got a 
couple almost a year ago, but that was before I realized they were too 
expensive for my applications.  I'm leaning back towards MRF49XA now.  
Interestingly enough, there's about a 3 page spec sheet in the box for 
the AC164136, but almost no info apart from the schematic that 
references the ZeroG G2100 module (on the pictail, it's a little 
daughter board with 36 pins with a metal box mounted on it).  I think 
Digikey shows 40 in stock, but even they don't link to a datasheet.  
There seems to be a lot of discussion on Microchip forums if you want to 
followup.  I'm still interested in the technology (still dreaming of 
controlling my pics remotely with an iPhone/iPod), and they may drop the 
price if the project gets more volume.

Regards,

Tony


Alan B Pearce wrote:
> Try a tag helps ...
>
>   
>> But where are the data sheets - they claim to be in production ...
>>
>> http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en547511
>>
>> http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en547512
>>     
>  
>   
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