A member of CDRLabs' Forum has posted a link to a complete (well almost) list of DVD writers and if applicable, the name of drive on which it is based on (OEM).
This could save people some money (e.g. when that want to buy DVD-writer A for $300, which is actually based on DVD-writer B which only costs $225). Check it out here.
A list with standalone DVD recorders can be found here.