A quick Google search appears to have answered my own question: http://www.streetdirectory.com/travel_guide/108648/alternative_medicine/house_plants_for_better_sleep.html

But I am curious, putting aside those few plants that actually release oxygen at night, would the average plant that releases carbon dioxide at night compromise the breathing air in the bedroom and to a meaningful degree?

Here is another forum where a similar questiion was raised: http://en.allexperts.com/q/House-Plants-721/indoor-plants-sleep.htm

The answer provided there seems to be the knee-jerk response that ignores that plants release carbon dioxide, not oxygen, at night.

And more analysis on the subject: http://fengshui.about.com/od/fengshuiforhealthqa/qt/fengshui_plants.htm

There was a discussion pretty recently about this:

Do plants rob a room of oxygen at night?

Thanks. Let's consider this post closed, and refer to the one already underway, which is very comprehensive.

Oxyplants India deals mainly with Oxygen plants, Nitrogen plants. We are renowned as the Manufacturer of Oxygen Plants, Nitrogen Plants and Acetylene plants.

Here is a link that might be useful: oxyplants

EXTRA COOL! But I'm really disappointed you don't have nuclear plants. :-( I soo had my heart set on one.

Hi,I am lokesh from india,To a certain extent, this is true. Photosynthesis and metabolism are completely seperate processes going on at the same time. While photosynthesis�by definition�needs light to proceed, and therefore fluctuates greatly depending on the incident light strength, metabolism is roughly constant throughout the day. Since a lot of the plant's growth occurs during daylight hours, the rate of metabolism also fluctuates, because growth requires energy.

Here is a link that might be useful: Ayurvedic Products Manufacturer

Lokesh, I was about to give you bonus points for actually providing relevant information, but then I found that you had simply copied and pasted from elsewhere on the internet. So now you are both a spammer and a plagiarist. For shame...

Oxygen plants made me lol, though.