Attached Link: http://www.digitalcarversguild.com/products/agr/galleryframe.htm

At the bottom of the attached link is an example of a logo done using DCG's most excellent Anything Grooves. The spline modeller has vector drawing tools so in theory you could do a logo entirely inside Carrara if you wanted (assuming you stuck to procedural textures, that is). DCG's noir filter lets you do some interesting post work right in Carrara. Also check out www.dvgarage.com for lots of great tips on making things look realistically distressed which can help when trying to composite elements (such as an insignia on a ship).