Unnamed sources are saying that Cisco recently applied to join the WiMax Forum: An official Nortel press release announces that Nortel has joined the forum. Cisco might be an unwelcome addition to the forum from the perspective of existing vendors because the company tends to dominate markets. While the company has significant wireless roots in the Wi-Fi business, it hasn't historically sold radio gear to the community of operators that builds large metropolitan networks. So it would be interesting to see how Cisco's presence might alter the WiMax market. But I'll reserve further comment until Cisco's WiMax Forum membership is confirmed or denied.