WiMax is the upcoming new darling of the "new telco wannabe" industry, and has recently started to rival Wi-Fi in terms of market hype.

Being fundamentally unsuitable to carry most traditional telco's ATM traffic, lacking compatibility with existing equipment (as well as actual deployments), and slowly plodding through a standards quagmire it looks to be the second most fragmented standard after its predecessor.

See 802.16, 802.16a and successive letters of the alphabet.