Would be interested in knowing which router you purchased and which software you are using. I guess if the observer is being used then you must use ambients software?
I purchased the TP-LINK TL-3020 router (amazon). They are REALLY inexpensive! At the moment I am running version 3.3 of Meteobridge on the TL-3020. Here is the link to the wiki that pretty much explains everything about rolling your own. http://www.meteobridge.com/wiki/index.php/Home. The Meteobridge software has a 30 day free trial after which you need to license it and cost is dependent on the exchange rate (dollars to Euros). Even with the cost of the firmware license and the TL-3020 router, you are still money ahead compared to the turnkey AW WeatherBridge (same exact end result). As for the ObserverIP, yes it ONLY runs firmware from AW (Fine Offset actually), but since the ObserverIP is primarily a receiver for the sensors, this is what it is. The Meteobridge basically is doing a HTML screen scrape to pull data from the ObserverIP but the setup work well.
Many thanks for the info. But even with this setup, still no ability to add another temp sensor which reports in place of the temp sensor on the main unit?