http://www.reddit.com/r/Bitcoin/comments/2t6ksp/coinbase_just_made_tax_accounting_unnecessary/ (http://www.reddit.com/r/Bitcoin/comments/2t6ksp/coinbase_just_made_tax_accounting_unnecessary/)
This is genius and we should consider incorporating a similar mechanism with bitAssets and the various gateways and commerce cart/plugins etc. being developed.