Personally I'm a BIG fan of
Kaionesoft's SprintDBpro.
SprintDBpro is available as both a ppc and desktop download is relatively cheap and pretty easy to use (It has to be for me to be able to use it!

), a very indepth tutorial is available on the website along with loads of example databases free for download.
SprintDBpro is quite powerful supporting SQL statements, macros, queries and variable programming.
I've downloaded and experimented with a number of PPC database programs, but Sprintdbpro is the best/easiest I've worked with. The developer is available for support and questions, although you'd need to allow at least 24hrs for a reply and have to break the question down in to small chunks (he grubbled when I sent an 8 page question

)
SprintDBpro is available as a free 15 day download from the link at the top of the page.
Let us know what you think and how you get on.