Rayzoon is offering deep discounts on its advanced virtual drummer Jamstix 4 and expansions, up to 60% off. For example, 'Jamstix 4 Studio' is $99 instead of the normal $249 price. All expansions are on sale, Jamcussion is $29 instead of $69, MetalPak and BonzoPak can be had for $19 each instead of $49 and the big MiniPak bundle, which is already a great deal at $59, is on sale for just $39. Anyone still using Jamstix 1, 2 or 3 can upgrade to the latest version for $29. All existi