First-hand accounts of oral arguments in Eldred v. Ashcroft are starting to show up. Several can be seen atLawMeme and CopyFight. (Transcripts won't be made available for quite a while.)
The basic consensus is that the Justices asked hard questions of both sides, and that there's no way to know what they'll decide. No surprise there. Still, I'm looking forwarding to hearing more detail about the questions and responses.