I think the prices you just listed are insane. Apple may distribute apps through iTunes and they may charge a certain amount, but those prices are way off. First off, it is likely there will be many apps that are free. Second, $9.99 is a crazy amount for anything short of a mobile version of MS Office. I think the most an app would sell for is $4.99, anything more is going to hurt sales. I could see between $0.99 - $4.99, but anything more likely wouldn't sell unless it was an extremely ground breaking amazing app.
You really need to go here to see what prices we are looking at when the apps become available thru the itunes store.
http://software.brighthand.com/homeSoftware.asp?platform=-1&sString=Business+&+Finance&CatID=1
a $4.99 max for iphone apps is just not going to be the case.