WizarDru
Adventurer
Currently using #1, unless someone convices me otherwise.
and
In short, the abilities are specifically called out as Supernatural abilities, with the exception of Fascinate, which is 'spell-like', which also requires a Standard action.
The mundane actions that are being refered to are, IMHO, things like standing up from prone, attacking, moving, sheathing a sword, picking items up, and other specifically non-magical actions. In other words, you aren't prevented from taking non-magical actions while using your bardic music ability, primarily. However, you still need to spend a standard action to BEGIN singing. On that first round, when you start, you should only be getting move-equivalent or free actions (unless you're already hasted, in which case all bets are off).
From the SRD
Inspire courage is a supernatural, mind-affecting ability.
Countersong is a supernatural ability.
Fascinate is a spell-like, mind- affecting charm ability.
Inspire competence is a supernatural, mind-affecting ability.
Suggestion is a spell-like, mind-affecting charm ability.
Inspire greatness is a supernatural, mind-affecting enchantment ability.
and
From the SRD:
While singing, the bard can fight but cannot cast spells, activate magic items by spell completion (such as scrolls), or activate magic items by magic word (such as wands).
As with inspire courage, a bard may sing, play, or recite a countersong while taking other mundane actions, but not magical actions.
In short, the abilities are specifically called out as Supernatural abilities, with the exception of Fascinate, which is 'spell-like', which also requires a Standard action.
The mundane actions that are being refered to are, IMHO, things like standing up from prone, attacking, moving, sheathing a sword, picking items up, and other specifically non-magical actions. In other words, you aren't prevented from taking non-magical actions while using your bardic music ability, primarily. However, you still need to spend a standard action to BEGIN singing. On that first round, when you start, you should only be getting move-equivalent or free actions (unless you're already hasted, in which case all bets are off).