This post does demonstrate a good point: someone that creates a turnkey shopping cart service for third-party sellers, calculates the current bitcoin price for the store item, takes the bitcoins, and sends the shop owner the fiat currency they are used to would further the Bitcoin currency movement much.
I totally agree.
And for the record: I wouldn't ask for anything for free, I feel like I offer a valuable product on my site, which is the whole point of wanting to offer to accept bitcoin in the first place.