The webcams refresh every 30 seconds. To get your hackerspace's camera here, add it to this list and then notify Will. If you're using Safari and keep getting phishing messages, complain to Apple, Androidwebkey, or Quelab. Or just get a real browser ;)
Also see the Alpha One Labs Ustream Matrix -- this page is just for non-Ustream cams.

Ace Monster Toys (California USA)
HeatSync Labs (Arizona USA)
Hive13 (Ohio USA)
Quelab (New Mexico USA)
Sector67 (Wisconsin USA)