Xingtone, a start-up based in Los Angeles and Amsterdam, announced secured a first round of institutional financing led by Siemens Mobile Acceleration. Xingtone has developed a software application that bridges personal computers and mobile phones, enabling MP3 and CD libraries on a PC to be used to create custom ringtone. Users can also upload content, such as images and games, to their own wireless handsets. Xingtone's software is compatible with all open networks, including Sprint PCS, Cingular, AT&T Wireless, and T-Mobile. Financial terms were not disclosed. http://www.xingtone.com