Generally speaking, we pay a lot of attention to tips from users. Sometimes we try to ride 'em out when we know the situation will blow over, but let's quickly talk about 6snap – Rudy Huyn's Snapchat client for Windows Phone.
Very early this morning, an update went out to users with a few choice improvements, including a new API. Long story short, the app was built using a preview compiler, which caused crashing when the app was launched. Huyn was very aware of user-reports on the app crashing and immediately pulled the app to prevent further breakage amongst users. The new fixed version of the app was also submitted, but surprisingly it has still yet to hit the Store.
Anyway, the point is 6snap is fine, and it will be back very soon.
Source: Rudy Huyn