iPhoto alternative?

[Malcolm Hamilton]

Hi all -
Is it o.k. to ask a software question here?  I'm a long-time 
powerbook user (Titanium), and figure you people might be as 
conscientious about your software as you are about your machines.
I like iPhoto, but I'm wondering if there's something better out 
there... I don't mean something as big and complex as Photoshop - - 
I'm not wanting to transform my photos into art exhibits - - I just 
want a fast, dependable, elegant way to store and organize them.
iPhoto does quite well, but, for example, I'd like the ability to 
store smaller 'albums' within larger ones (like keeping all the pix 
of my son playing soccer together in their own album, but keeping 
this album inside a 'Summer 2003' album, or something like this).
There may be other nice features that other programs have that I'm 
not aware of.

Don't get me wrong.  I think iPhoto (especially version 4) is a great 
free app, but if I don't mind spending a bit, is there something 
better?
Thanks,
Malcolm