Socialtext acquires wikiCalc, one-ups Google Spreadsheet? We've wrote recently of Google's latest free spreadsheet offering, and the number of other competitors out there. Now Socialtext, the early Palo Alto wiki company, tells us it has acquired wikiCalc, a spreadsheet product produced by Dan Bricklin. Bricklin carries weight because he invented the first spreadsheet, VisiCalc. The difference, co