Florian Seroussi asks “what’s the cost of Twitter?”

Florian Seroussi writes Never mind what are Twitter costs, whats the cost of Twitter? Short answer: a LOT!

[tease]

At a growing pattern of [Twitter usage] doubling in size every 6 weeks, we can expect twitter to cost 30M hours per month of productivity.

Our estimates for 2008 suggest @ a minimum lost productivity cost of $20/hour this [Twitter usage] will represent $300M/month so $900M for first quarter, $600M per month for 2nd quarter so $1.8B, $1.2b per month for 3rd quarter so $3.6b and $2.4b/month for 4th quarter so $7.2b.

Wow.