Have done two tours with Petar and his company (so far) while visiting Dubrovnik and the Islands in Croatia. He is fantastic, and he is doing a great job with his company.
We took the ferry from Korcula to Orebic and met Petar who transferred us to Dubrovnik, via 3 wineries (including Grgic), and a beautiful lunch in Mali Ston. Everything was fabulous, and Petar was a charming man - very proud of his heritage and very knowledgeable as well. We also did a city tour with Petar leading the driving portion to show us the various views of them old city, and then passing us off for a walking tour with Givo, who was also an excellent guide.
I would highly recommend contacting Petar when you come to Dubrovnik. Believe he also does airport transfers (but taxi is just fine as well).
For Rick (and Cameron) - please keep this one high on your list.