Google Refine is a power tool for working with messy data sets, including cleaning up inconsistencies, transforming them from one format into another, and extending them with new data from external web services or other databases. Version 2.0 introduces a new extensions architecture, a reconciliation framework for linking records to other databases (like Freebase), and a ton of new transformation commands and expressions.
Delicious taking a lot of flak on social media after the relaunch. Will they get it right or fizzle out? More arguments for local storage with web services to join people and artifacts.