Wow, it never really occured to me that it was rude or bad etiquette to read at a poker table. I used to get bored from time to time when I was at a table full of boring people so I'd bring novels with me and figure I could kill two birds with one stone. If anyone became lively or chatty, then I would put my book away. Very simple.
I don't like to use an iPod at the table, but again, if the table is extremely boring, then I will put one in one ear so that I have something to keep me amused. I always tell people that if you see me with my iPod, it's because I don't like my table. Of course there is argument that I should leave the table, but it's a bad habit of mine in live games to generally stay at the table they put me at.
I don't get how people can be so concerned about reading or ipods slowing down the game. Sure, they may be a factor, but it's no different than people who are chatty at the table and get so engrossed in conversation with others at the table that they slow down the action that way.
Having said all this, I am probably one of the least anti social people at a table. I love chatty tables, I love chatting at tables, etc. But when you get a dead table, I don't see the big deal in reading or having an iPod. Also, I have only ever read a book or used an iPod w hile playing fixed limit hold'em. When I play NL, I find that I feel the need to be a lot more focused and aware.