just a tip for people that might be feeling screwed by nokia: sell the n900 and buy something else that suites your needs. like someone else said, dont make your life so terrible. you should enjoy the device. if a cell phone is making you start thinking about plots, conspiracy theories and boycots over a device that is working perfectly fine something is clearly wrong... and it is not with the phone.
Why do I have to pay for Windows when the Linux people enjoy a free OS? Forget Sygic - if you like the software and think it's better than Ovi maps, then buy it (when it comes out). The presence (or absence) of Sygic has no effect on whether Nokia will produce free navigation for the N900. My suspicion is that, when development of Ovi Maps for m6 is complete, they'll make a decision on making it available for m5. Until that point they don't know whether it'll work, or even whether it's worth it (if m6 is out shortly afterwards, and will be available for the N900, why bother).