I've tried several xml parsing libraries and several Amazon libraries and have decided that the current combination of BeautifulSoup and bottlenose are what I enjoy working with the most. I've been able to bang out tools for myself using this combo very quickly and have actually had fun building each one of them for a change.
import bottlenose
from BeautifulSoup import BeautifulSoup
# Replace these values with your correct info
AWS_KEY = 'key_goes_here'
SECRET_KEY = 'secret_goes_here'
ASSOCIATE_ID = 'your_associate_id_goes_here'
# Create a bottlenose object and initialize with our credentials
amazon = bottlenose.Amazon(AWS_KEY, SECRET_KEY)
# Query Amazon's Product API to perform an item lookup via the ASIN, returns the large response # group containing a ton of info, note that we must send the associate id now
response = amazon.ItemLookup(ItemId="B0018AFK38", ResponseGroup="Large", AssociateTag=ASSOCIATE_ID)
# Create a BS object from the XML response
soup = BeautifulSoup(response)
# A sample of the data that can be retrieved
print soup.find('itemid').string
print soup.find('formattedprice').string
print soup.find('detailpageurl').string
print soup.find('sku').string
print soup.find('content').string
print soup.find('title').string
print soup.find('department').string
print soup.find('smallimage').url.string
print soup.find('mediumimage').url.string
print soup.find('largeimage').url.string