I ran across a new website today called Irish Gleanings at http://sites.google.com/site/irishgleanings/.
It is extracted information from hundreds of Irish migrants derived from US State Department records at the US National Archives. You might find a place or date on that elusive ancestor.
The site is well worth a look and I have add a link to it to my Irish Genealogy links page at http://www.jackreidy.com/genealogy/irishlinks.htm
