Hiya,
Twice I've been a sent a Word document with comments and could not view them on the iPad. I use iWorks for doc editing and also have GoodReader for viewing docs. None of these show the comments.
Any ideas?
I think Documents to Go Premium will show Word track changes. I frequently work with other redline programs that produce marked copies and the basic iPad email program can show those changes. But track changes is a special little problem courtesy of Microsoft.