Currently, project squid supports the following classes:
Druid - Feral
Rogue - Assassination
Hunter - Beast Mastery
Warrior - Arms
Death Knight - Unholy
Paladin - Holy (Insane PvE parses with Glimmer build, plus PvP utils)
Demon Hunter - Havoc (Work in Progress, PvE / PvP rotation + utilities, some minor bugs)
Monk - Windwalker (Work in Progress, PvE rotation + interrupts only)
Shaman - Elemental (Work in Progess, PvE rotation + interrupts only)
These are sorted by most developed.
Our insane interrupt logic is also supported for every class.