Just spotted a 'Coming Soon' note on Ancestry of interest to Irish researchers.
It looks as though the Boston Pilot Missing Friends database may soon be joining the Ancestry line-up. The data, which consists of 41,051 advertisements seeking information about Irish immigrants to America, is currently hosted by Boston College, where it is fully searchable. It's also freely available, so I guess Ancestry will also be providing free access either to the full data or to an index that directs researchers to the Boston College site.
Either way, the move will widen awareness of this very useful resource. It's billed for a July arrival.
In the meantime, you might like to find out more about Irish emigration to the US on my website.