I'm late to the short story party, and even later to flash. For some reason I always associated story length with quality and depth. This is not the last time I'll be proven a real dum-dum.
Some excellent sources of flash fiction I've been reading lately:
CHEAP POP - fresh flash on Tuesdays and Thursday,
Cease, Cows: Quality flash, but also, how can you not read something with that name?
Longleaf Review: Newer, and killin' it.
Bodega: Weekly goodies, just like the candy store you only let yourself frequent once a week.