Word is that Deutsche Telekom (the parent company of T-Mobile) is now actively engaged in talks with Clearwire and MetroPCS to expand its 4G network. This isn't terribly shocking to hear, considering that most other providers (including AT&T, Verizon and Sprint) are already either heavy into negotiations or in the process of upgrading their infrastructure. Though the company hasn't yet said anything about planned expansions, word is its looking for the most "cost-effective" way to build nationwide networks capabl