You can buy the cherished old JRPG from the Square Enix Store for £7.99. Looks like the usual price is £9.99 - must be an early birds discount.
Original story: According to PEGI, Final Fantasy 7 will be released on PC today, with an age rating of 12.
A "releasedate [sic]" of 14th August 2012 is listed on the PEGI website.
We know Final Fantasy 7 on PC will be exclusive to the Square Enix Store. The Final Fantasy 7 PC website still only lists the game as "Coming Soon".
My best guess is that the release of FF7 on PC will be an imminent Gamescom announcement.