Microsoft stumbles with its first WiFi products

News.com reports that Microsoft is having problems with its set of new home WiFi products, which have otherwise received good reviews

Users have reported a myriad of problems, all involving dropped connections, and most affecting the company's MN-500 Wireless Base Station and MN-100 10/100 Ethernet Wired Base Station. Some users said connections were failing every half hour.

A Microsoft representative confirmed the troubles Monday and said the company planned to issue a firmware update to correct them.
I wonder what the underlying OS on the product is - embedded Windows or something more stable like *BSD, Wind River, or the like...