Trying to help my sorcerer correct some mistakes in her character creation (she's now level 2) and as I'm looking at spells per day, I see no reference to a formula for 0 level spells. Does that mean she has unlimited casting of 0-levels?
Yes, sorcerers get unlimited casting of their 0-level cantrip spells, as described below:
Pathfinder PRD wrote:
Cantrips: Sorcerers learn a number of cantrips, or 0-level spells, as noted on Table: Sorcerer Spells Known under “Spells Known.” These spells are cast like any other spell, but they do not consume any slots and may be used again.
