I'm not sure I believe it until I see a successful exit. Did the companies succeed? Did the relationship succeed? (The latter is a tough one to measure since marriage isn't for everyone)
These aren't meant to be snarky - Please share if you have more info.
Our company is still a work in process, but we've got paying customers and 5 on 5 as average review of the product (http://apps.shopify.com/fanchimp), plus two seed rounds of funding.
Sentimentally we've been together for 7 years, working as co-founders for about 5 now. We're happy and we're focused long term.
Thanks for the comment, yes we're still working on the startup and you're right, there aren't any big success with two co-founder in a relation.
Although my friends at AgentPiggy and http://www.gym-pact.com/ are going pretty well.
These aren't meant to be snarky - Please share if you have more info.