Yes! Today is the day Chili Peppers fans have been waiting for! Their latest album is in stores everywhere today, and is available on iTunes as well (with some bonuses). I'll have total coverage and a review later it the week, and I expect my friend and fellow blogger Brian to contribute an article for this week's Song of the Week.
The best deal I've found for Stadium Arcadium seems to be at Best Buy for $12.
SA is also available on iTunes for $20 and includes a digital booklet, music video, etc.
Stay tuned for more updates!