There are several fields of the standard object Asset which do not appear in the data model. In particular the picklist ProductFamily. It doesn't appear in DataLoader and when I use the Force.com explorer it's just not there. Also Product2, ProductCode, ProductDescription just aren't there. Again, when I edit an asset - not there!

When I go to "Asset Field-Level Security for profile System Administrator" the field is ticked readonly and I can't change it even though I am the system administrator. If it's readonly and even I can't change it's value what's the point??

Dude, where's my field?