Is there any way to add non Apple magazine subscriptions to Newsstand?

I also want to add my paper subscriptions to mags to my IPad and preferrably to Newsstand. Is there a way to do this?

@sulie: There is no way of adding subscriptions to the newsstand if the subscription you want isn't in the apple store.
@second poster: to add a subscription to into the newsstand app and open up the apple store by pressing 'store' then use the search function to find any subscriptions you want and add them by using the download button.

Proud owner of a 32GB wifi iPad2 iOS5.