LDraw.org runs contests and challenges on a monthly or quarterly basis.
Model/Scene Of The Month contests, are part of this program which intends to select every month (if there are enough candidates) the best Digital LEGO Model and Scene, made in LDraw format.
There are other contests like Part Of The Month (POTM) which runs monthly and The RAytracing CHALlenge (RACHAL) wich runs on a quarterly basis. For more details, read here.
The MOTM winner for January 2008 was a TECHNIC model, which is not very common, so I decided to make here an highlight for this.
It was an Hooklift Truck with Crane, by Norbert Taxberger
Functions of the hook-lift truck: lift up/down of roll-on containers, 2 backwards column for roll off process, two-axle steering, lift up the cabin, open of the driver and passenger door, 2 sideways column for the crane, pneumatic crane from set 8436
Length: 48 cm
Width: 17 cm
Height with crane: 23 cm
Number of parts: 2058
Development and building: approx. 300 hours
MLcad time: approx. 120 hours
You can see more pictures at www.mocpages.com/moc.php/27257 or Brickshelf
Because of the missing of the tyre (32019) and wheel (32020) in the part library, I had to use related tyres (32003/32004a).
Below some images from the model real brick version, with a less controversial color scheme...