Steve Myers at Poynter has a detailed piece on disclosing potential conflicts of interest, and says the New York Times shouldn't throw stones at Michael Arrington and TechCrunch.
I'd like to take this opportunity to disclose that Boing Boing invests in three businesses, and three only: Acme Kitten Manufacturing, Conglomerated Steampunk Industries, and Joe-Bob's House of Discount LSD.
UPDATE: Someone reminded me about our legacy holdings in Amalgamated Unicorns, Incorporated. I regret the omission.