John DeGiglio is one of the smartest people I know, and one of the most relentless developers I've ever seen. If you give him a problem, he will solve it. John and I used to write .Net apps together, and he specialized in SharePoint. He's become an expert over the last 5 or so years.
John's recently published his first public blog articles and CodePlex projects on integrating Twitter with SharePoint.
How this WebPart came together is documented in two blog posts hosted by Synergy Online:
John's also restarted his blog Backhand Volley at DeGiglio.biz. Unfortunately some good content was lost when Microsoft shutdown MSN/Windows Live Spaces. He didn't get the notification from MS to download his content before it was deleted.
John's also on Twitter @jdegiglio and his Tweets just went public! I expect more SharePoint or tennis focused tweets, John's a huge tennis fan.