One thing Michael and I have in common, genealogically, is Quaker ancestors. Michael, in fact, descends from the Hicks family and his ancestor is the second cousin of Elias Hicks 1748-1830 who created schism in Quakerism, with his followers becoming known as Hicksite Quakers. In any case, there are many good places to find information on Quakers online. However, I'm fairly sure we have only seen the tip of the iceberg on Quaker records. The three major depositories of these records [two of which I still need to see] are: The Rhode Island Historical Society (New England records); Swarthmore College (Baltimore records, which include northern Virginia); and Haverford College (Pennsylvania and New Jersey records).
Quakermeetings.com which tells you where specific records are and what years they cover.
New York Quaker Records are actually online!
The Quaker Calendar [this always gets me. March is the first month. Most people see 15 7 mo. 1742 and think July 15 instead of September 15th.]
Cyndi's List has a Quaker category.