Tropos has frequently been paired with Motorola Canopy for metro-scale networks: However, Motorola has a division that competes with Tropos, their Motomesh line, which was primed by the acquisition of MeshNetworks. Motomesh doesn't support the notion of residential access via mesh-based 2.4 GHz Wi-Fi, but they are all about mobility in city-wide networks, using a combination of proprietary and Wi-Fi encodings and 2.4 and 4.9 GHz radios with up to four radios per device. Tropos, for the time being, focuses on single-radio 2.4 GHz Wi-Fi with user access and mesh occurring on the same devices and channels. Both solutions need backhaul.
EarthLink signed a deal that pairs Tropos with Canopy for their first five city deployments, while Tropos included Canopy among their partners as part of their platform development that allows top-to-bottom management and reporting across an ecosystem of wireless devices--from customer premises adapters (CPEs) to backbone equipment.
Canopy competes head-to-head with Alvarion, with both going after similar market segments with similar technology. Both claim a high degree of WiMax feature compatibility in their current product line-ups and both will be fighting for deployments in municipalities that involve hundreds of base stations. This is the first move I'm aware of by Alvarion that specifically ties their equipment to a relationship with Wi-Fi access. The deployments I'm best aware of are direct broadband wireless replacement.