ArsTechnica has an article which says publishers are complaining, but no one is going on record to say it for obvious reasons.
It should be clear that this isn't the case with Live (the bandwidth charge), otherwise we'd have heard of it by now and I'm sure it wouldn't be news.
http://arstechnica.com/gaming/news/...sony-charges-publishers-for-ps3-bandwidth.ars
It's not hard to believe that publishers on Live! don't have to pay -- you'd expect the bandwidth costs to be covered by the Live! subscription. And really, Sony can't foot this bill itself, and it certainly can't charge for PSN at this point -- since it's free, it's easier to overlook the places where PSN is inferior to Live! today (because they are fairly close). I don't really see what else Sony can do.