Femtocells may be one of the closest things we have to a win / win in the wireless industry, lowering infrastructure costs for carriers and giving customers on-demand, self-installable coverage where they wouldn't have it otherwise, all without requiring WiFi-capable handsets that UMA services like T-Mobile's HotSpot @Home do. It makes sense that a number of carriers would be rushing to get femtocells into end users' hands, then, and both O2 and Vodafone are doing exactly that in separate European trials. O2's trial involves NEC equipment in the UK, while Vodafone is turning to Huawei and Alcatel-Lucent to supply hardware to Spanish testers. Both trials involve 3G cells (yay!) and at least O2 has gone on record saying that a successful test will lead to commercialization by early next year. Kinda strange that Sprint is so far ahead of the curve on this one, but hey, do you see us complaining?
Read - NEC and O2 trial femtocells in the UK
Read - Vodafone Group trials 3G femtocell technology