I couldn't venture a guess, since I don't know what's involved. I guess if I thought about it...
1. Parse a website's HTML.
2. Present a website inside some sort of text box (?) or other mechanism.
4. Extract the HTML that was selected and rewrite said HTML into a package recognized as a widget by popular blog and social networking sites.
You're suggesting $100, which would put each of those 4 steps at about $25 each. A programmer capable of doing this kind of job would easily charge somewhere in the $50/hr range, so your estimate puts each step at about 30 minutes worth of work. That is a crack smoker estimate if I ever heard one.
I'd say more like 5 hrs per step, and that's for a programmer who's done this kind of thing before... $1,000. It would probably take me twice that long but my hourly fee would be half as much.
Tell you what... email Orchestr8 and ask them how much they spent to develop their system. Prepare to be shocked.