Stumbled upon this article. Wise words of caution. 
Very amusing satire. However, it is worthwhile to point out that even though RasPi Model A/B is "the size of a credit card" it won't fit in an Altoids box because it doesn't have rounded corners like a credit card. The BeagleBone does. Gerald Coley told me those rounded corners and mounting holes made BeagleBone placement and routing a real pain.