Amsterdam/Austria/Prague

[Beau]

My wife and I are planning a 2 week trip next spring. I think we've settled on a pretty good itenary, but I'm looking for some advice on transportation.

This is the plan so far:

4/28 - Arrive in Frankfurt (Stay and Learn Hostel)
4/29 - Travel to Amsterdam (Flying Pig Uptown)
4/30 - Amsterdam (Queensday) (Flying Pig Uptown)
5/01 - Amsterdam (Flying Pig Uptown)
5/02 - Travel to Prague (Sir Toby's)
5/03 - Prague (Sir Toby's)
5/04 - Prague (Sir Toby's)
5/05 - Travel Salzburg (Yoho Hostel)
5/06 - Salzburg (Yoho Hostel)
5/07 - Travel Innsbruck (Nepomuk's B&B Hostel)
5/08 - Innsbruck (Nepomuk's B&B Hostel)
5/09 - Munich (stay with friends)
5/10 - Travel Frankfurt (Stay and Learn Hostel)
5/11 - Return Home

We were planning to fly from Amsterdam to Prague, and take the train everywhere else. I don't know if a bus would be a cheaper option, or worth it. Our friends in Munich can give us a ride to Frankfurt. Any advice or sudjestions would be greatly appreciated.

Thanks,
Beau