Buckinghamshire Genealogical Society
founded in 1992 to assist members living outside the county with their Bucks research
http://met.open.ac.uk/group/kaq/bgs.htm

Buckinghamshire, England: Parish and Probate Records
This database is a collection of historical parish and probate registers from the county of Buckinghamshire in the Country of England. The 145,000 records in this collection can range in date from the early 1500s to the mid- to late-1800s. Some non-parish records may be included from as early as the twelfth century. Parish records--primarily bapt...[More]
http://www.ancestry.com?db=5847

Pallot's Baptism Index for England: 1780 - 1837
http://www.ancestry.com?db=5968

The Bucks Family History Society
for both those with Bucks ancestry (who may live at a distance) and for those who live locally
http://www.bucksfhs.org.uk/