You know, I was disappointed at first when I heard that Welker was not going to be in the movie, but I think Weaving did a good job. I actually heard a recent tape of Welker doing Megatrons voice, and it wasn't quite as good as it used to be. I'm sure they could have beefed it up in post, like they did with Weaving, but it's too late now. I'll probably wait until the 3rd/G1 cut before I attempt to use the original voice. It's going to be quite a task, as the old cartoons loved their background music, and it's hard to seperate much dialogue.
Frenzy has been reduced a slight amount in this first cut, and most of his silly noises and english dialogue are gone. The ad-bots (dewbot/xbox-bot) are completely gone. While they're interesting Transformers, it kind of cheapens the Allspark, in my opinion. I may even cut the phone-bot in this next cut, not sure yet.
I don't think this will be on newsgroups (at least no one I know is putting it up yet), but it will be on RS, and probably torrents eventually. If you have too much trouble finding it, just send me a private message (make sure to turn yours on in your settings first).