Now that the netsilicon site has been taken down where do we find the updates for Net+os?

Try Digi main site –> support –> firmware upgrades, select a device type. In the next page click “Patches” and select your Net+OS version from the OS dropdown.

For example (DigiConnect ME, OS version not selected yet): http://www.digi.com/support/productdetl.jsp?pid=2466&osvid=121&tp=6