I am looking for resources regarding cups and balls. I have Ammar's book and the relevant chapter from Hocus Pocus Junior. Does anybody know of some other media on the matter?

That is a great suggestion, I know because I just got it. There is some great stuff in there

Have a look at Youtube. There are some excellent performance videos there.

I suggest you book and DVD of Aldo Colombini,

Colombini's Cups and Balls Teach-In
by Lewis Ganson & Aldo Colombini

Aldo Colombini teaches the routine with which he won the close-up competition at FISM 1976 in Vienna, Austria. It includes ideas by Dai Vernon, Charlie Miller, Pete Biro and Larry Jennings, as well as many original elements by Aldo himself.

This was part of the famous Ganson Teach-In series originally published by Supreme Magic Inc. Rights are now owned by Martin Breese whom we thank for the kind permission to reproduce this booklet.

1st edition 1977; original 26 pages; PDF 35 pages.

Table of contents
page

4. CONTENTS
5. DEDICATION
6. INTRODUCTION
8. THE COLOMBINI PRESENTATION
10. REQUIREMENTS
11. SET-UP
12. GETTING READY
13. PERFORMANCE
13. - THE OPTICAL MOVE
14. - THE CAN-CAN MOVE
16. - THE TILT MOVE
18. - THE FLYING CATCH
19. - THE TRAVELLING BALLS
21. - BALL THROUGH TABLE, HAND AND CUPS
24. - MILLER PENETRATIONS
26. - THE BALLS PENETRATE TWO CUPS
27. - THE ULTIMATE VANISH
30. - THE FINAL LOAD
33. - THE CLIMAX
35. CONCLUSION

Also on DVD: Mamma Mia Magic - Aldo Colombini

Columbini’s cups & calls routine is the highlight of this DVD. His version is particularly flashy and he offers an astounding technique that allows you to apparently display an empty cup when it’s not and make it look as if a ball has left from under a cup when it hasn’t.

He also adds lots of flair to the routine by flipping cups around in a flamboyant manner that covers some of the workings behind the magic (his “can can” move). There’s also some through- the-table-work that Columbini, well, brings to the table.

Overall, I think that Columbini’s cups & balls routine appeals more to magicians than laymen. There’s no patter and the action occurs quickly. And I have a feeling that laymen who aren’t concentrating could easily lose track of where the balls are supposed to be. From a commercial standpoint, Columbini’s routine lacks large loads at the end.

www.penguinmagic.com/product.php?ID=1613 I have this 2 dvd set and it is great. It teaches you all sorts of techniques and not just for cups and balls (wands and silks too).