SEARCH FOR LAND TITLES AND LAND PATENTS:

http://www.avana.net/~lhaasdav/Patentlocations.html (all states)

http://www.glorecords.blm.gov/ (BLM eastern states land records)

http://www.innernet.net/hively/newpage29.htm (PA lands, with links)

http://image.vtls.com/collections/LO.html (Virginia land office records)