I heard that Mash would replace 360 in the near future. And I want to know about my data on my Y!360.?

You partially heard wrong. Y!Mash is not totally replacing Y!360. Y!360 closing in the sense that it may no longer be called Y!360 when the transition to a new social networking platform is done. So, what other people call "closing", I call "reconstruction." There will be a tool created to help you move some 360 content & all friends to the new profile. Although, you should back up your content just in case. Yahoo has decided to combine it's 3 services (360, Mash, and the regular Yahoo Members Profile) that basically accomplish the same thing (i.e. telling the world about yourself) into one service. They just haven't pinned down the "how" of creating this "universal profile". The transition should happen in early 2008. So, if there are things that you do like about Yahoo! 360 that you would like to see remain intact, you should state those aspects on the Y!360 team's blog at http://blog.360.yahoo.com/product_360 . That is also where you can read the FACTS about the changes in store for Y!360. To read my view of the situation and tips, see http://blog.360.yahoo.com/blog-4D4zxsg6fLRvC60pERfR7.8c?p=417 . UPDATE: "Insider sources" amount to rumors until confirmed by an official notice. For factual information regarding what will happen to Y!360 see the Y!360 team blog - where it clearly states the following: "Q: Will the new profile service be Mash? A: The universal profile will not be Mash -- at least not the Mash that you see today. The new profile is likely to share the same platform as Mash, which means that we can provide you with greater flexibility than you currently have on 360°."

Yahoo blog will close 360 beta in early 2008, replacing by a new blog service , so far it's MASH. Everything will be automatically transfered to this new blog service as they promise. For Mash, you can use blog RSS to put update your blog entry on Mash, Mash hasn't completed its blog entry function. Friend list is easily transfered because it's already in your yahoo account's address book. To get an invitation for Mash , and to update information about Mash, please refer to 360themes.com. Moreover, they have more than 2000 Mash layouts with CSS code. Hope you find what you wanna know!

Y! will replace Y! 360 by Mash, it is confirmed. I got it from an insider. It will do it best to migrate everything smoothly. So, just get yourself a Mash 1st.