.dae (COLLADA)
I just looked into this a little and it is a pretty new thing and looks to be buggy in solid works. What are you using for your cad program? Are you just looking to make pictures or do you want dimensional accuracy?
Can you work with STEP or IGES or STL? these are real standards typically used for cross compatibility between mechanical solid modelers. Max, Maya, sketchup and those other modeling packages are not as good if you actually want to make the part. They just don't play as well with CAM software.
$.02
chad
When the going gets weird, the weird turn pro.