When we first discovered SearchMash.com it reminded me, not in
services, but in concept, to a search service (a trial site) from another large engine. Sort of a search playground.

Back in June we posted: that Yahoo had applied for a servicemark/trademark for a search engine named Trovetopia.
http://www.trovetopia.com

After reporting the news on RS,
http://www.resourceshelf.com/2006/06/12/shopping-search-trovetopia-a-shopping-engine-beta-from-yahoo-and-more-new-trademarks-from-yahoo/

shopping search guru Brian Smith reported that Trovetopia was a "test bed for [Yahoo!] APIs it's built entirely using the web services available on the Yahoo! Developer Network."
http://blog.searchenginewatch.com/blog/060612-094804

Differences?
+ SearchMash makes no mention of Google on the home page.
+ Trovetopia's focus is shopping.