I've decided to make or get a singlespeed bike. What is your favorite place to find singlespeed bikes or singlespeed bike frames?

Here a webpage about singlespeeds, for those who haven't seen it yet:
http://www.sheldonbrown.com/singlespeed.html

So far, I have found two websites selling singlespeed frames and bikes:
http://www.irocycle.com/framesets.html
http://www.sheldonbrown.com/harris/singlespeed.html

What other options are there?

Personally, I'm looking for a singlespeed road bike. I want something light and simple. After many years of never shifting, I've slowly decided that maybe what I really want is a singlespeed.

My only form of transportation is my bike. I want a light, powerful bike that's dependable. Virtually all of my riding is around town on asphalt or broken cement. I always stay in my hardest gear (44-11), so I'll want to put my own gears on the new bike. So a simple frame is fine, even preferable -- unless a whole bike is cheaper. I realize I'm not a professional racer, and I don't want to spend thousands of dollars shaving off the last few grams of weight. I'll pack less tools or go on a diet instead. But I do want value for the price. Something that's efficient and dependable, and not extremely expensive.

I've tried the local bike shop, but they only have one singlespeed option, and they'd have to special order that.

Does anyone have advice on finding a good singlespeed bike?