As I get to know Windows 7 I will post helpful tidbits here.
Where did my user profile go?
You used to find your profile information under c:\documents and settings\. You will now find it under c:\Users\
Where did the SendTo folder go?
When I wanted to add an application to the right-mouse-click SendTo list, I would add a shortcut to my application in the c:\documents and settings\<userprofile>\SendTo folder. With Windows 7 you will have to go a little deeper. Instead of Documents and Settings, you go to c:\Users\ and then to \AppData\Roaming\Microsoft\Windows\SendTo.
The full path: c:\Users\AppData\Roaming\Microsoft\Windows\SendTo