Preparing and Improving Data Quality
Phil Barker  (salesforce.com), Carol Parker (Orange), Jodi Hrbek (Protivity)

Filtering Out Dirty Data
Phil Barker (salesforce.com), Chris Badger (Inside Scoop), Trevor Wilmont (Sirva)

Filtering Out Dirty Data (R)
Phil Barker (salesforce.com), Glenn Wilson (CRMfusion), Theresa DeRycke (salesforce.com)

Naming Convention Best Practices
This worksheet provides guidelines for corporate names and abbreviations so you can establish consistent data which will help with searching and reporting....

Below are three partner solutions that I'd highly recommend for imporving data quality.

Data Quality: Inside Scoop

Mass Update: Demand Tools

Lead De-Dupe: Ringlead

View All Data Services / Data Quality Partners