A lot of people missed the emails sent by the shopping engines about seasonal rate increases, so here’s a quick summary:

Become.com – no rate increase
Yahoo! Shopping – no rate increase
Google Product Search – free
TheFind – free
Pronto – not holiday related, but there will be some adjustments, both up and down (Nov. 15)
Smarter.com – 20% rate increase for all categories (Nov. 1 – Dec. 31)
Shopzilla – 25% rate increase for all categories (Nov. 12 – Dec. 31)
PriceGrabber – 25% rate increase for all categories (Nov. 1 – Jan. 15)
NexTag – 25% rate increase for all categories (Nov. 1 – Jan. 2)
Shopping.com – 10-25% rate increase depending on category (Nov. 15 – Dec. 31)