Google's Index Bench: Build Your Own Google Search Engine?

Gary Price reported that Google registered a few new interesting domain names including bench-index.com, benchindex.com, index-bench.com and indexbench.com. Since then Garett Rogers speculated that this may mean Google is building a product to allow users to build their own flavor of the Google search engine, much like how Rollyo does. Philipp Lenssen guesses that Google may be releasing some sort of Alexa engine. Some folks at Philipp's forum suggest that "IndexBench could be tools that measure the quality of an index." Loren Baker leans to siding with Garett Rogers's guess. Me? I have no better guess at this time.