I didn’t see anything on the Snow Leopard Enhancements and Refinements page about Detectors being added anywhere but TextEdit.
Data Detectors in Browsers
June 30, 2009 | 2 Comments
Membranophonist's Ramblings
Interaction and interface design, technology, politics, music, and random thoughts…
August 29, 2009 at 1:31 PM
Speculation: Safari uses Webkit and Data Detectors is a part of Core Text. Are they mutually exclusive? (I don’t know.)
May 20, 2010 at 11:54 AM
Mail can parse structured text in HTML e-mail, so I imagine Safari should be able to access Data Detectors.