Found another cool source for keyword research. Ebay is nice enough to list out all of their most popular keywords. See http://buy.ebay.com/
Not sure how current the list is, or how often they update the list, but it can't hurt to have another source of ecommerce search keywords.
Wordtracker has their TOP 1000 and if you turn on the adult filter, you get a whole slew of keywords. Only a small percentage are ecommerce related, but it's cool to see how many words actually crack the TOP 1000.
What's shaking on Yahoo! Shopping? Yahoo Store owners have access to the weekly Yahoo! Store TOP 100 searches. It's located in the YAHOO STORE MANAGER > under STORE SEARCHES.
Don't have a Yahoo! Store, yet? I'd be happy to email you a sample week's list if you drop me a line at rob (at) ystore.com.
Shopping.com also has started showing folks the most popular keyword searches on one of the most popular
You can cross-reference these sources. One way I used to get ideas for affiliate projects was to take the TOP 100 Yahoo list and run it through the OVERTURE SEARCH SUGGESTION TOOL to see what all of the sub phrases would be.
More as I think about it! Happy 2005, y'all! -- Rob