Step aside O2 and Vodafone, there's a new sherif in town. At least there will be if the announced 50:50 merger between T-Mobile UK and Orange can be signed into existence by November as planned. The new venture would give France Telecom and Deutsch Telekom units a 37% share of the UK mobile marketplace leaving O2 with 27% and the once mighty Vodafone with 25%. Let's hope that the corporate cultures mix better than orange and magenta.[Thanks to everyone who sent this in]Filed under: CellphonesT-