"Not working" is a great way to troubleshoot, but I think I found the problem with the Today Agenda OEM. It's missing an RGU file which means it will work, it's just missing the registry entry to make it show up on the today item list.
Code:
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Today\Items\Today Agenda]
"DLL"="TodayAgenda.dll"
"Type"=dword:00000004
"Selectability"=dword:00000002
"Enabled"=dword:00000001
"Options"=dword:00000001
You can either add that to one of your personal OEMs, add it to a reg file and import it, or create the key and entries manually in your registry. I've fixed it for next release of the PPCGeeks_OEM pacakge.