OS X V10.7 Lion :: Screen Sharing Name And Password Always Required?

We have a Mac Mini connected to our HDTV, pretty much for media server duty only. No mouse or keyboard conveniently located as a rule for this rig. We use the excellent Rowmote app (mouse, keyboard and romote control) on our iPhones to control it and it works great most of the time. However, sometimes you need a real keyboard. Since we usually have laptops handy, Screen Sharing seems like an obvious workaround. However, it ALWAYS (and when I say ALWAYS, I mean going back to 2005) asks for the name and password regardless of and inspite of checking and rechecking "Remember this password in my Keychain" about a thousand times since Screen sharing was first offered on the Mac OS, right up to 10.7.3. 

This pervasive bad behavior can also be duplicated verbatim on our kid's media Mac Mini also.This is not a big thing, but it doesn't work, and hasn't worked for a very long time (in computer years). Does anyone know how to simply click on the Mac Minis, click the "Share Screen" button and well, share screens without constantly being asked to type in a name and password every single time?

Info:
Mac mini, Mac OS X (10.7.1)