First of all, I'm not talking about the "Send to OneNote" printer driver found under the "Select Printer"; that option is working fine. I'm talking about the Tools -> Send to OneNote option. I have Windows 7 Home Premium x64-bit. Some history.
I had the Office 2010 Professional Beta installed. I uninstalled it to day and re-installed a trial version of Student. And for no particular reason, I don't see the "Send to OneNote" option under the Tools menu. I went to "Manage Add-ons" and there's nothing disabled that would keep it from working (indeed, I only have the Blog add-on disabled).