A roundup of information about the Colosseum restoration: http://rogueclassicism.com/2012/11/18/colosseum-restoration-coming-soon/ (via @rogueclassicist)
Ways to remember Greek meters: http://www.armand-dangour.com/mnemonics-for-greek-metre/ (via @rogueclassicist)
Paint the Peplos Kore (requires Flash): http://www.theacropolismuseum.gr/peploforos/ (via @classicslib and @DrKillgrove)
A nice overview of Roman law: http://flavias.blogspot.co.uk/2009/06/roman-law-courts.html (via @CarolineLawrenc)
Underground Roman tunnels (including a mithraeum) will open for visitors: @http://www.theartnewspaper.com/articles/Ancient+tunnels+in+Rome+reopen+to+the+public/28073 (via @cortsims and @SarahEBond)