How often do Sony bring out new laptops?

[IceBus]

I'm going to be buying a laptop for uni in the next few months and obviously want to get the best spec that I can to ensure it'll last me as long as possible. I really like the look of the Sony Vaio FE11S but I was wondering if they're likely to bring out a new range/revision before September?

Anyone know how often Sony bring out a new range of laptops?

Thanks,

Pete