[nickf]

Sorry, but that's incorrect. The major browsers will let you in - you just have to pass all their audits, comply to all their regulations, and commonly have a WebTrust audit....which can set you back mid-$xx,xxx. All browsers/OSs are accepting new roots all the time - check the Mozilla dev lists/Bugzilla and you'll see.

[briansmith]

You also have to wait about 5 years before you will have the 99%-99.9% browser support that customers require.