I have not used these tools myself, but I came across a good blog article answering this very question a few weeks back: http://blog.kickofflabs.com/how-to-do-a-great-product-promo-...

+1 because I want to know the answer to this as well.

I know that After Effects was used to make one of the best animated videos out there: http://www.girleffect.org/

After Effects is one of the best. You can download a fully functional version from adobe for 30 days, or get a months worth subscription for 30 to 40 dollars. Of course there's a bit of a learning curve. Good Luck.

I've done tons of these types of videos using After Effects, it's really the best motion graphics package out there, but you really have to know how to use it well. Hipmunk's looks definitely like it was produced with After Effects.

If you would consider contracting the work out, my contact information is in my profile and I would love to show you my reel of previous work, that I did mostly in a former corporate video production job :)

Not as fancy, but pretty good:

http://www.powtoon.com/

Thank you! I had seen this here a couple weeks back but couldn't find it again!

I agree with this

I actually just bought this for a month, it's awesome so far! http://goanimate.com/?utm_source=inviteshare&refuser=0dh...

After Effects, Flash if you're desperate.