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The system works very well, but requires a dedicated computer to read and record the station data. It became inconvenient for me to maintain a dedicated serial port, so I decided to build a standalone controller. Originally, I was going to have this controller read and log the data, which could be periodically read and added to a master log. In the meantime, however, NetMedia came out with a spiffy little Ethernet Web Server module, the SitePlayer. This postage stamp sized coprocessor makes it easy and cheap to get data onto a network. In addition to serving web pages, it is also capable of sending and receiving UDP data packets, and will soon feature telnet capabilities. Since I always have my server running, it provides a perfect interface to my weather station.
In the future, I plan on adding sensors for barometric pressure, moisture/dew, and cloud cover. Rainfall measurement devices are available, but I don't plan on adding one since we don't really have enough precipitation to make it worthwhile. Here are all the technical details of the project. You are free to use any or all of this information in any way you wish. I'm happy to answer any questions, though I don't guarantee the world's fastest response. Downloads:
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I
monitor the weather at Cloudbait with a simple 
The
system is now in place, and has been operating continuously since
May 2001 with no problems. It consists of the Dallas weather station,
a Motorola 68HC705C8A microcontroller, and a SitePlayer module.
The processor interrogates the station about once a second, calculates
raw values for temperature, wind speed, wind direction, humidity,
and a second temperature at the humidity detector. These values
are placed on a web page and also broadcast system wide via UDP.
A client application running on my server (and optionally on any
other machines on the network) receives these data packets and calculates
average values for display and logging.