Many will give (or not) you ideas regarding an online venture. It's always easier to start something where the bitcoin business never goes out of the computer realm. But you'll have a reduced target market, increased competition, and less chances to succeed.

Still, some real-world service or product demands you to link to the non-crypto economy, which requires clever business plans.

For one, I'd think it would be great to manufacture some specific items Bitcoin lovers would love having. Yeah, the btc T-shirt venue seems to be as commonplace as the jeans market in general. You know, every fine dinner at home I find myself wanting a nice BTC corkscrew... or... cork substitute to save the wine for later. BTC symbol and caption saying "Don't spend it all in one seat", it could say... which is wise advice for BTC and Wine. :-)

S.