I think the standard answer is no, all people want to see is your name, job title and contact details, keeping it clean is apparently the new black. Post nominals are for CV's so they say, and this is someone who has Assoc CIPD on my name on LinkedIn!

Personally I think it will depend on your industry and what the standard approach is.

But bigger question is how often does anyone use a business card these days?

In reply to Keith:

I rarely use my cards nowadays, but I am going to the USA soon and have been told to take plenty, as they just love them over there.