Via Threadwatch and an e-mail from Become.com's CEO and Co-Founder, Michael Yang, news that the shopping research engine is now providing dynamic search term suggestions that can help the searcher create a more precise query (with little effort) even before clicking the search button.
For more about Become.com, here's a link to a SearchDay overview article by Chris.
Become.com joins other search services that provide dynamic search term suggestions. In some cases, suggestions are related to the popularity of the query. In other cases, the suggestions come from a controlled vocabulary of terms. Some of these services include: