Leaked docs show HTC's DROID Eris launching on November 6th for $99, running Android 1.5

[Thanks, anonymous]

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Stock android OS is ugly. Sense UI is much better. I'm sure someone will get Sense UI running on DROID though. Hopefully HTC ROM can enable multitouch.
Only question here is why 1.5?? and not 1.6? or 2.0?
iphone 3gs is wayyy better
Could someone please answer these questions for me:
First, is 'Sense UI' essentially a graphical overlay... kind of like a 'skin' for the android OS by HTC? I have seen the videos of the sense UI and it looks very attractive. Just wanted to confirm that's kind of how it works.
Second, this is probably a dumb question, but what is the difference with android 2.0, and why is it a big deal? I hear a lot of people talking about it, but I haven't heard what the differences really are.
Thanks.