Justine over at All about Tahmoh Penikett has found two recent reports from a BSG fan who was able to visit the set of Battlestar Galactica during filming.
One lucky fan got to visit the Galactica set while they were filming an upcoming episode of BSG (213, I believe). She has posted pics from her visit, including spoilery pics of some stand-ins (one for Jamie Bamber), as well as some non-spoilery behind-the-scenes pics of production crew and of the CIC and a Viper.
The same Vancouver-resident (screename Yori) also came across the BSG crew filming a different episode (217/218) on location. You can read her report and see pics over at the SciFi message boards.
The full post, with links to several set visits, can be found here.