A while back, someone contributed a celebrity sighting for our "Seen and Heard on BART" feature (www.bart.gov/seen) -- that actress Felicia Day, of "Buffy the Vampire Slayer" and "Dr. Horrible's Sing-Along Blog," was seen riding BART from SFO into San Francisco. Flush with excitement that an actual, popular, contemporary celebrity would take public transit (sorry, Jerry Brown), SFBART messaged Ms. Day on Twitter wishing her a happy visit to the Bay Area. Alas, we never heard back.

But now we know ... she noticed!

Send your sightings of celebrities -- and other interesting stuff -- to us @SFBART on Twitter ... the best every week get included in our roundup, and we occasionally give $25 BART gift cards for our favorites.