I'd be pretty concerned about drinking that beer.
StarSan residue from rinsing is one thing, but 800 ml's is a whole different thing.
Here's an email quote from Five Star I found on HB Talk:
"Safety: the EPA requires testing on various materials to determine if they are toxic or not. They, have determined that the safe level of Star San is no greater then 1oz in 3 gallons of water. We need 1oz in 5 gal to get the proper kill rate, but not to exceed 1oz in 3 gallons. Beyond this level you would need to rinse the surface. You are correct in assuming that these chemicals can be harmful. For example, to get enough kill to be considered "Disinfect, or Sterilize" you must rinse after. The only level of kill that is "No Rinse" is "Sanitize"."
thanks for the heads-up. i think what they're talking about though is 1oz of concentrated starsan per 3 gallon where as the solution that got into my beer was 1oz diluted into 5 gallon that i then poured into a mason jar. i think it should be ok, i guess i'll have a couple pints one night and see if i wake up.