Like some other ppl pointed out, it's more mainstream now than 10 or 20 years ago, I think largely due to the internet. Jenna Jameson is definitely a household name, there were more posters of her than Jessica Simpson or Christina Aguilera back when there was a Tower Records. In my cousin's yearbook back in 03 or 04 she was voted "most popular actress." Lisa Ann as Palin in an Eminem video was also pretty mainstream. Many porn girls have minor roles in TV shows & movies making them about the same as certain reality TV show stars, perhaps a B or C-list celebrity? I've seen porn girls on the cover of many guitar magazines & even on some CDs (Jesse Jane, Janine, etc). Many billboards for strip clubs here in L.A. will usual advertise with a Vivid girl on them. All this would NOT have happened in 1975 or 1985. So it's getting more mainstream, but it will NEVER be Hollywood or Disnely level. Audrey Bitoni's #1 Fan [:P)] In Lust w/ Bridgette B now!
I think the question shouldn't be "so how mainstream is porn now", but "is porn more acceptable now". Let's face it, porn will NEVER be mainstream, nor should it be. I'd say more accepted, or maybe better yet, more overlooked as if it is not such a big deal. In something kind of related, I find it interesting that outlets like G4TV, TMZ, and even CNBC talk about or do special reports about the adult industry. Still, I wouldn't say that makes it more "mainstream", just not that big of a deal anymore.
"The line is getting thinner between - and there’s not so much black and white between - the porn world and real world anymore. People aren’t making such a big deal about it. They’re more accepting of it. It’s like ‘She did porn? Ah' " - Bree Olson (CNBC)