Goomarkalicious is a project mainly written in Python, it's free.
Google Bookmarks to Delicious converter
goomarkalicious
Author: Douglas V. Johnston ([email protected])
Summary: This will copy all your google bookmarks to delicious keeping ALL tags, dates, urls from google. All the other methods I found that tried to do this failed to keep all the tags, so I wrote this to do it right.
Install pydelicious from http://code.google.com/p/pydelicious/
Grab http://www.google.com/bookmarks/find?q=&output=rss&num=10000 while logged in to your google account and save it somewhere.
run: python goomarkalicious.py
Enter your delicious username/pass when prompted
Wait a while (the script is slow so that delicious doesn't throttle and block it)