The Pennsylvania State Archives has added over 300,000 images of land records to the Web. (That’s more than 31 gigs of data.) You can access these new records at The Pennsylvania Historical and Museum Commission’s Web site, at www.phmc.state.pa.us . (That URL is a redirect that’ll take you to portal.state.pa.us and a much more complex URL.)
The additions include warrant registers (1733-1957), patent indexes (1684-1957) and the Philadelphia Old Rights index. You can start your search here; be sure to read the instructions because there are several sets of documents you can search.
A lot of the available documents are in PDF format so make sure you’ve got Adobe Acrobat reader.