[_puk]

I understood that was the point of LGPL over GPL; it stops the GPL licence bleeding into other areas if you are simply using a library as is.

This makes it viable to integrate LGPL libraries into commercial products.

[quadrangle]

you can use GPL in commercial products. Just follow the GPL. It's not ant-commerce. Oh, you meant "proprietary" products? The set of commercial and proprietary is not a union, it only overlaps.