I read on a blog somewhere that the Saleae project started life as an open source project but
funny thing when i was searching info for scanalogic, the creator is (was?) a member in a forum asking questions, and almost having fight in dangerous-prototype. the magic thing about it that made me digging the net is how 20MHz clocked AVR sample at 20MSps, it turned out the circuit is more creative than i thought. it inspired DP admin? (or member? not sure) to copycat the topology.
The Saleae is a very well made product with great support, the Itead product isn't. You pays your money......
saleae is well made on the software (but not 100%), about the logic hardware, who's copy who? the cypress board? usbeex? or the china? or the saleae? the logic16 is just another fpga based LA, i would say similar to OLS. its just the good thing, just as other company/manufacturer, saleae put it all together into a working product. no mess with "no case" circuit, no mess with java or command line etc.