Anarchist journalist Chuck U has put together another excellent radio story covering MassCann's annual Freedom Rally on the Boston Commons. Here's his 2005 Freedom Rally Report, which was originally broadcast on WMBR's What's Left on September 18, 2005 [21 minutes, 19.8 MByte download].
You can check out the current WMFO radio show he cohosts with Jamie McLaughlin called Free of Form every Friday evening from 10 pm until midnight live on 91.5 FM in the greater Boston area, and the current WMFO Schedule page also has a link to the last archived show.
MassCann Public Service Announcements are also available online.