This is a simple addon created for my guild's raids, originally meant to report interrupts.
The functionality was expanded by my co-author, Sherrim and the addon now covers the following:-
* Spell Steals
All Announces are reported in /say, there is no in-game configuration to change the output channel. The reason for this is that I simply wanted all my raiders to report in a way that made sense to me when leading raids.
You can, however, edit the .lua file to change the output to /party or /raid if you so wish.
The addon is also disabled in all PvP zones (including Tol Barad and Wintergrasp) as experience has shown that it annoys people. It is not disabled in Arenas as reporting can be very useful there.
Finally, the Spell Steal module of the addon has exclusions written into it for 'spammy' bosses such as Arcanotron. Any boss that requires spamming Spell Steal in the future will be added to the exclusion list. This is simply to avoid spam during a boss encounter - reporting is all well and good but spam reporting is contrary to fight co-ordination.