First of all, I have to say that Mausau is doing a great job with these plugins. BUT...
I think those plugins should have been made a long time ago and not by someone from the outside, but from the Ahead developers. I see it like that: Mausau is doing the work, that the Ahead developers are being paid for! Nero is a commercial software product that you have to pay for, so I would expect that the developers do something for the money. I don't think that Mausau sees anything from this money. The plugins they did (mp3pro, aac...), you have to pay extra.
And what about the legal thing. As I understand it, there are patents used in lame, mpc. Isn't the use in Nero violating those patents? (I have to admit I don't have a clue about those legal things, so please correct me) And of course the GPL of the code used in the plugins. I don't see the sources nowhere.
But to come back to Nero I have to say there are some things that piss me off. First of all, the updates come out very often. That would be a good thing, but... Take Joe Average. He is sitting at home and sees that a Nero update is out. He thinks: Hmm, what's new? But there is no chacelog! So he downloads the ~15MB on his 56k modem. He installs it and guess what. The audio plugins are still not there. The option to set default 0s pauses between tracks is still not there. The problems with multisession CDs are still there. Joliet file system is still not there. Even such simple things like checking the finalize check box after you choose no multisession is still not there. The DVD burning problems are still there.
And so on... So in the end, what was the download good for? Yeah right, nothing. You have a software full of bugs and flaws. Oh, and what about the CloneCD-like features that other burning softwares are implementing? You can guess...
I stopped using Nero a long time ago. There are better (and free) alternatives. And as for Mausau, I think he should devote his time and work efforts to a project where other people don't get the props and profits he deserves.
Sorry for the long post, I got a bit emotional