For me, harvest doesn't stop until a killing frost smashes the plants! There is a relation between enough space (ah, yours sound happy not to be so crowded) and the number of peppers. Since my peppers are garden-planted, the affecting relationship concerns water -- if they suffer drought, they will pause producing until they are re-moisturized.

You can extend the harvest by wrapping a couple layers of row cover around them whenever frost is expected. Or bring the pot indoors to a sunny window.

A while back on another forum, folks were comparing notes about overwintering peppers. The consensus is that with bright light, they make interesting house plants, but won't continue to bloom unless they can have a south window, lots of warmth, and additional fluorescents. Picky plants. Anyhow, the thing to note is that most (all?) peppers are perennials and can be replanted into the garden next spring, and will start producing peppers much more quickly than a baby plant.

Yep, I plan to overwinter several of my peppers. I think the jalapenos, tabascos and cayennes will be overwintered.

I'm going to pinch off some of the blooms to let the plant put some effort into the peppers themselves.