So yeah, I just got my invitation today and found it pretty snazzy. I mean, it's similar to Outlook and even more so to Gmail, but that IS a good thing. It's simple and clean. Though, I wouldn't be surprised if that changed once it goes public.
Anywho, here's some screenshots (jpg, so some colours are off) if you're wondering what's it all about:
http://img.photobucket.com/albums/v133/VampiroV.Empire/Mail.jpg
http://img.photobucket.com/albums/v133/VampiroV.Empire/New.jpg
http://img.photobucket.com/albums/v133/VampiroV.Empire/Junk.jpg
http://img.photobucket.com/albums/v133/VampiroV.Empire/Calendar.jpg
http://img.photobucket.com/albums/v133/VampiroV.Empire/contacts.jpg
http://img.photobucket.com/albums/v133/VampiroV.Empire/Today.jpg
Did you sign up at live. com as a beta tester? if so, how long did it take?
Apparently you get several invites, like gmail. Is this true?
Nope. Only MS sends out invites.
You may be thinking of the new Live Messenger or whatever it's called.
For the deletion thing: Try clicking at the top of the list of your bin and hold shift and click on the last message at the bottom of the list. Then hit delete. Not sure if you knew that or not. :p