Seeking Online Exposure

Charity devises Web tools for keeping tabs on Congress

When the Sunlight Foundation, an organization here that uses Web technology to expose the workings of Congress, decided it wanted to know how many members of the House of Representatives had used campaign money to hire their spouses, it turned to its phalanx of researchers — the American public.

The organization issued a call for help on its blog at 5 p.m. on a