Tableau, which Gartner describes as a self-contained BI platform with data mashup capabilities and direct data connectors, is one way to move when you are hitting the limits with Excel.

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Companies like Yodlee, Mint, Wesabe and others are empowering banking customers to mashup data from all their accounts and aggregate them in a single integrated view.

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Pamela Fox, a 22-year-old computer science grad student who builds Amazon mashups for fun, recently did a mashup of maps and corporate data for Chevron as a class project--crunching what would be a weeks-long project into one hour of mashing.

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And the better it understands what users are doing with a mashup--something that only the owners of the original data see best--the better its search results.

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