Pictures. Also questions for SD1 owners.

Since this is supposed to be a tech forum I've always refrained from posting my pictures just to share with others for no apparent tech related reason.

I've now found the perfect excuse for sharing some of my work done with the SD14 and DP1S though. Namely, proving my legitimacy.
Beware though, the last shot is from a Canon.

If You have a SD1 and don't care about shots from lesser cameras You can safely scroll to the bottom of this post.

Springtime forest flora and funga. Can You spot the spider?

This is known as Blanchard Spring. It's the source of a local trout fishing stream. The introduced, non-native trout thrive because of the consistently cold water from the spring.

This was my summertime swimming hole when I was a kid.

Same place but with higher water and a longer exposure for that dreamy look.

This is a male bluebird, he lives in my front yard. He's a busy guy, hungry mouths to feed.

This is a male hummingbird and "his" feeder. He's a busy guy too, ever vigilant in defense of his territory.

This is a long exposure twilight shot of the falls from a local mineral spring.

The same falls as above, in the cold winter sunlight.

This is a local rock formation known as Wagon Bridge Arch. The ruts of an old wagon trail across the top are still barely visible.

This is Hundred Year Falls. So named because it only runs once every hundred years. I have only seen it happen this one instance. We here hit with 11 inches of rain overnight, it ran for a few hours the next morning.

I'm not sure what this creature is. It seemed to fit the veiled, almost dreamy misty feel of the scene.

This last shot of the Andromeda Galaxy is stacked from multiple 30 second exposures at 200mm f/2.8 ISO 1600 on my Canon 50D. I'm in a very rural area and so have really dark skies. My streetlight is the only one visible from my house and it can be temporarily turned off by aiming a laser pointer at the daylight sensor.

If You couldn't find the spider or just want to enjoy the un-interpolated Foveon pixels, all the shots in this post can be viewed at full resolution here:
http://www.pbase.com/bigflat/my_photography

I would like to try astro-photography with a foveon sensor. Unfortunately, since the SD14 does it's own (I think ill-conceived) dark frame subtraction it is crippled for astronomical, long duration captures. The SD14's implementation of dark frame subtraction over-estimates and thus over-corrects for the noise, resulting in "anti-noise". It's obvious to me that the second consecutive long duration shot will be noisier than the first. It doesn't make sense to use the second shot as a baseline for noise removal on the first shot.

I hope my shots above will prove I'm a bona fide foveon user and also interested in astro-photography. I'm not asking this to ridicule the foveon sensor, I'm legitimately interested in the long exposure, high ISO performance of the SD1.

Now my questions.

How does the dark frame subtraction work on the SD1. Is it optional hopefully, or a dark frame after each shot or a dark frame after the buffer fills like the SD14?

How does a completely dark 30 second exposure at ISO 1600 look, noise wise? If it does okay with that, can it do consecutive 30 second shots acceptably? If not then how about ISO 800 or 15 second exposure? If still bad then how does it do after chilling in the refrigerator first? Freezer?

Thanks for Your indulgence.
-Jerry