An article at DeveloperWorks here. Some obvious, and some good points about service design.
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Excellent 2PC details
Mike Spille has a extensive aricle about 2-phase-commit here.
Via Colin Sampaleanu.
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Yahoo UI design patterns and library
Yahoo has a page here describing some of their standard patterns for UI design on the web, some of them AJAX based. They also seem to have a opensource Javascript library available for download.