After reports surfaced that Apple had rejected Google's Voice application and related offering from third-party developers from its iPhone app store, the Federal Communications Commission didn't waste any time before stepping in to demand answers.

But to many observers, the FCC's swift response suggests that something bigger could be going on at the agency than just a fact-finding mission regarding a few blocked apps.

Last Friday, James Schlichting, acting chief of the FCC's Wireless Telecommunications Bureau, sent letters to Apple (NASDAQ: AAPL), AT&T and Google (NASDAQ: GOOG) asking for details about the decision to keep the search giant's VoIP application out of the app store.

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