Yahoo! and Alibaba are finally beginning their troubled divorce, with the Chinese e-commerce firm buying out half of Yahoo!'s stake in a $7.1bn deal valuing the company at $35bn overall. Meanwhile, options for Yahoo! to shed its remaining shares are also on the table, with Alibaba required to buy - or allow Yahoo! to sell off - another quarter when it floats for IPO, while Alibaba will also be able to operate Yahoo! China under its partner's branding for a further four years.