Yahoo! Mash trial and free invitation

Yahoo! Finally couldn't bear to be lonely and launched its own social networking service Yahoo! Mash, it's been rumored for a long time that Yahoo! Is working on its own social networking service, but there hasn't been enough hard evidence to prove that Yahoo! Mash's launch illustrates how Yahoo! It does compete with Facebook,MySpace,Orkut. I'm from Mashable! The community was invited to try it out for 1 day, and felt that some places were interesting.