The digital preservation Stack Exchange failed. Its topic was:
Q&A site for professionals working to ensure long term access to digital objects.
Is a digital object "data"? Is, therefore, digital preservation on-topic?
There may be a bit of a coincidental interest in this subject for the folks who frequent here, but I don't see that "digital preservation" is within the field or specific expertise of this site.
If you look at the example questions for the original Digital Preservation proposal (http://area51.stackexchange.com/proposals/39787?phase=definition), most of the questions are of the format:
What storage format will last the longest for my application?
That type of expertise and specialized area of study doesn't really seem to fit anywhere within this circle: