I read this but didn't reply as I was confused by your definition of "offline".

Give me an example.

For example, I've worked with a skin care product line manufacturer and we did a small buzz promo (though not an event-based "launch") to sell more of the new cream and to land retail (aka. "JV") partners.

I also worked for a client for their summer camp for kids (with a fantastic personal development twist). We had an online promo for a 1-day "launch" in order to sell more summer camps. So the promo was "online" though the product being sold was "offline".

Is this what you're referring to?

Tying into that, I run the Canada Marketing Summit. A 4 day conference. Obviously it's "offline" but the ticket sale were "online".

However, if you're specifically asking about a "launch" (ie: event based promotion), then I have limited experience.

Toss in a example or clarification of what you mean though. Maybe I wasn't the only one who had a tougher time understanding the question.