BigInteger type in Orcas

So, you know I was thinking, Int64 is just too limiting for my integers. I mean, I might generate a product that every single person on the planet may need to purchase dozens of versions of. How will my ordering system deal with that with only a piddlely     9,223,372,036,854,775,808 allowable Ids? Good thing the BCL team is thinking of me and my future by including the [new BigInteger structure](http://blogs.msdn.com/bclteam/archive/2007/01/16/introducing-system-numeric-biginteger-inbar-gazit.aspx) in the next update to the .Net Framework.     

All I have to say is…..DAMN, that’s big. I’m sure there is a reason for numbers this large in programming, but I’ve yet to come across them in my line of work. Perhaps more mathematical based applications have need of this. How about you? Do you need BigInteger?