A couple of updates to Ancestry's database in the last few days:
More than 300,000 entries have been added to the South Australia, Australia, Police Gazettes, 1862-1947 collection. This was a World Archive Project (WAP) ie indexed by volunteers, but you'll need a Worldwide or Australia.com.au subscription to view the records.
Emigrants in Bondage 1614-1775 is the product of another WAP. It holds some 50,000 entries of men, women, and children sentenced to deportion to the American colonies for various crimes, many of them very minor. Although the description of these records refers to English deportees, this seems to be an assumption. The deportees had been tried in English courts, but having searched using a number of traditional Irish surnames, I'd suggest that many of the individuals were Irish. You'll need a Worldwide or US subscription to view the records.