I've been doing this for the past 6 months. Go after things like Amazon or ebay if you're really crazy.
Otherwise, I've started forums on www.runescape.com, & www.leagueoflegends.com to ask them to accept bitcoins. If enough people reuqest it, Runescape will seriously consider it.
I'm sure any other business will be the same way. Just the same as we don't want to go spamming forums to "buy bitcoins" we also don't want to spam forums to accept bitcoins. Only post on websites where you are willing to spend bitcoins.
For me, I would gladly spend $5 on League of Legends or register for a month or two of gaming on Runescape again if they would accept bitcoins.
There are many other forums dedicated to this much better use of time. Please seek out those forums and help that. Adoption, is the best sustainable way to add real value to the currency!
+1