I feel blessed, not only is there an e85 station a block from work but there installing another one across the street AND they just added one at the closest station to my house...barely a mile away.
For the "I'm scared of losing lubrication" crowd get on bitog and look up tcw3. Been using it for about 10k on 93 and w the e85. Seems to work well, no residue on the plugs thats for sure. There's a 50 page thread with a couple years of documented use. At $12 a gallon and taking about 3oz per average fillup it lasts a long, long time.
I never told PRJ it was in the tank when he tuned and asked him if anything was out of the ordinary and he, nor his wideband could tell so its not going to affect your tune as long as you keep the correct ratio going.