We’re on Pinterest now, under the url http://pinterest.com/irishhistory (“irishhistorycompressed” being – according to the website – too long for a name. This is the same problem as Twitter has, which partly explains the lack of an Irish History Compressed Twitter feed.)
The first board is already up, on the subject of Dublin’s Sackville Street / O’Connell Street through history. More will be added soon, so check back regularly!
A screenshot of Irish History Compressed’s first board on Pinterest.