I like the idea and I've installed the add-on, but at the moment the notary servers are too unreliable. The default list of notary servers fail quorum as most don't seem to respond/be up to date. I've seen other lists of servers (e.g. in the comments on the Firefox add-on page) but again, the servers listed there aren't consistently responsive.

It does occur to me that I could be being Man-In-The-Middle'd but I don't think so (well I would, wouldn't I ;)

I'm currently using this list instead of the default list:

perspectives1.schulte.org:8080 -----BEGIN PUBLIC KEY----- MIHKMA0GCSqGSIb3DQEBAQUAA4G4ADCBtAKBrAF9YhEaUx+MR/9dw/ceF5+DAmTm KRylGYKz+rfLSKMS1PMfkGiXVB12qkGOj321PrphLs2s9KWLcxHnCwJdQWcg2xIA VQbZ2I5me2PEJNC+1Y9nqPR6AeKEljDPK/A1KiTjwDGjpvru8Djp25q++VJjhUZG y0Wq845LMMUbQGefh05IL4Y9vuMWRUjs0C6enkI5CnCcMIFD1uY5+rsqknw1Nthn 2ZhTVfcjxTsCAwEAAQ== -----END PUBLIC KEY-----

perspectives2.schulte.org:8080 -----BEGIN PUBLIC KEY----- MIHKMA0GCSqGSIb3DQEBAQUAA4G4ADCBtAKBrAGcQwe1IeEnF/ZobSywrpzbv6Uw sZyxU7WThAaJ1EKy7UIYSrcJ6v/qurFwn9DwR8hxpXCgE8MRZdfVi99z69VE0Nmw 6vHLuC0PKQ/m3Gc+4LzfEyJ/fsPFsTsSqwog+ys8ehvCifoazewyLAZvVfBW3TVZ uv7REooR5rWVrkI05z/VLpY9eSanWxaBJikHE3AnfOocI60ZIvq2eftIkpqCppwr AZtwGtmxHa0CAwEAAQ== -----END PUBLIC KEY-----

perspectives3.schulte.org:8080 -----BEGIN PUBLIC KEY----- MIHKMA0GCSqGSIb3DQEBAQUAA4G4ADCBtAKBrAG0L5/mnLvIjQbD6yazszjVBWCb K7iUiav/M/9qoph2s1Nd2HSbEa2pZsNTtRrPNd2uPkYPGjkuhv5Ba3AMezN4eeEJ pxa0wBSuYX7deUcQCu+0W/tLXZ61ny/Ezu/mnAQ10HIiO7mQnDTliF4ReSWC9TuR axLr1tEh3i/pRoSOCtcWIR5y59BYu+GiPHl9IDOBraTG0R9ph+3fDVtf+kd+WUVv /d0tWI0UmGsCAwEAAQ== -----END PUBLIC KEY-----

perspectives4.schulte.org:8080 -----BEGIN PUBLIC KEY----- MIHKMA0GCSqGSIb3DQEBAQUAA4G4ADCBtAKBrAF+1OV01dpujDpFoUtld37Pgy4/ 67E7EFB7YyHkfQbTuPnfZ2+UNScl80vcmN1hym8XJ0icPahah+SXMLq81UNxO6Xq 4s/41C5IxjnZN2Ij3EvhSPQ9HrK9+CVUmLWTWQRG7t5JaKGdlmYc5Fou1/SMoURZ z4LWWGwcYH5/DcBt64XL5c87v4g3mfCDptmFMg5Cy34uG+XEh0obvp5S+uuORwn1 agGH5DYpR1sCAwEAAQ== -----END PUBLIC KEY-----

notary2.qabs.cz:8080 -----BEGIN PUBLIC KEY----- MIHKMA0GCSqGSIb3DQEBAQUAA4G4ADCBtAKBrAGYNrXeOuExUPjrwisreOZ67ZTT xaPVLncYrVrvE2Q3KzAqVvGlhyxZMnSLlHlHD5BJsA3bM/15ForpH/dJL+GnONZY sQdgVdDXH30231bImuOzqBNCqMsTB4hxg9U6a1J4h7sa1eOn5Zz1EbDGuW2+jEcE 0MjqpaYEEW7FZiZOIJQRz4jX26zfGGhtd7txfkZQ26lhiibo9auCxp1tnVJmBX2S VisNlAuuLM8CAwEAAQ== -----END PUBLIC KEY-----

Edit: removed servers that I just noticed were usually dissenting in the quorum. - So an attacker wouldn't have to MITM many extra domains with that list.