Re Subdued commercial interests   Jim thanks for your message on my talk page  From my understanding of the Wikipedia guidelines for external links links that merely point to a commercial site without any obvious informational value are discouraged  Whether the other sites on the digital microfluidics article actually hide a commercial interest I do not know  Perhaps its an issue that you could bring up on the articles talk page or even on the talk page of the External Links guideline itself to provoke a general discussion  Regards