For those having trouble with the EC2 instructions, I thought I'd point out that I think that the Archive Warrior[0] (which is much easier to get up and running on your laptop, etc) running over my tethered cellphone is my most performant client.

Yahoo don't appear to rate limit mobile devices / IP blocks as aggressively as everything else (probably because cellular providers tend to have many customers behind one IP).

[0] http://www.archiveteam.org/index.php?title=ArchiveTeam_Warri...