In its MWC 2011 "Scoreboard:Infrastructure" FierceWirless says:
" .. tide of mobile data is rising and is a problem .. but a range of vendors promise a more delicate approach to the problem--and at MWC this year they were out in force. Vendors both big (Alcatel-Lucentand Tellabs) and small (Allot Communications, Flash Networks, Telcordia, Broadhop, ByteMobile, Sandvine, Acme Packet, Bridgewater and others) made policy control and network optimization hot topics of discussion among wireless operators"
"there was surprisingly little buzz about possible tactics to discharge traffic onto alternative transport systems. Operators by and large seem keen on building, accelerating and strengthening their licensed wireless networks--the assets they can easily control and charge for. Femtocells and Wi-Fi offload, while maintaining a sizable presence at MWC, weren't the must-see checkpoints of previous years."See "Mobile World Congress 2011 Scorecard: Infrastructure" -here.