[nazgulnarsil]

Good god, I wish there was a visualization like this for everything. Especially if you could input your own parameters and get your own personalized "worth it" line.

[Malic]

Good god indeed - there's a germ of an idea for a Google Labs project right there. And if it worked well, it could change decision making of ALL kinds.

[Groxx]

Might be worth emailing them. It's generated from a Google Docs spreadsheet, so it's entirely possible.