example.com/folder/folder/ seo friendly?

seo folder subfolder optimization

[bluetoothache]

hi,

i am making a shopping store and would require a lot categories on folders. is it SEO friendly?

for example:

[example.com...]

thanks.

[bluetoothache]

in addition.

i am seeing a lot of results using the "folders-folders" directory structure. like several of this from amazon
www.example.com/exec/obidos/tg/ detail/-/yadayada.htm
and other shopping merchants.

what are the pros and cons?

thanks again.