Really, Larryd has a point... I have Macromedia FlashMX, however the learning curve for that is way too high for me right now. (It's about $300) I currently use CoffeeCup FlashFirestarter ($49) to make simple flash effects. It's nothing fancy, yet people have asked me how I learned to program flash Then I have to tell them that it was in FireStarter. I have an example on the church webpage I am working on: http://www.emmanuel-godwithus.org It took me about 25 minutes to do this.
There is motionartist as well as swishmax, Flash, and the one mentioned above (and probably many more).
I was able to get motion artist for around 19USD while Swishmax was 99 and Flash CS3 came at the upgrade price for web premium (not cheap!), but it does allow for a lot of versatility (as does swishmax) but if you are on a timelimit or do not care to learn a new program with a steep learning curve, go with one of the template based programs such as motion artist.
If you want to learn flash, I would recommend buying a template (or getting a free one) and attempting to reverse engineer it. It helped me to get a better grasp on it.