you may find something here.
http://www.dexigner.com/directory/cat/Packaging_Design/

I would recommend purchasing som eof the Graphis Packaging annuals. I think they are un to number 9 now. I own the first and seconds publications and they are a great source of inspiration to me, loads of great packaging designs from the 60's which easily associate with todays trends.

you could try looking for them here

www.abebooks.com

http://www.abebooks.com/servlet/SearchResults?sts=t&y=0&tn=Graphis+Packa...

What I also find useful is just to take a day out and look round supermarkets or other similar stores. I was in Waitrose the other day and they had a number or really well designed products.

the design archive at AIGA is very good. along with packaging design, it has many other categories like information design, book design, typography, etc.

I don't know if this is what you have in mind but there is some groovy vintage stuff for inspiration here.

Also this typophile thread:

http://typophile.com/node/30461

http://www.whatspop.com/blog/2006/01/tasty-juice-box-packaging.cfm

How creative is this?

I wrote a book, in fact, about package design.
http://www.delmarlearning.com/Browse_Product_Detail.aspx?CatID=20156&ISB...

Some very interesting examples are included, as well as patterns for constructing them.

FontShop newsletters on packaging design and food packaging.

Louise Fili's website. www.louisefili.com. Excellent work.