The best I could find in 2007 was Attribute Extraction under the TOOLS menu. I set up the blocks with the attribute with the information I would like to appear in the BOM (Material Description, Material Pcmark, Length, Qty, etc...). With Attribute Extraction you can select entire drawing or multiable drawings or just an object. You could either extract the BOM to Table within the drawing or Excel format. If you need help setup something up let me know. I running a BOM for trusses now and works great. Good luck.