Did another APA this weekend. I pitched a healthy starter around 5PM; Wort was~75F. Woke the next morning and was going gangbusters but the temp was up to like 76. I moved it to a cooler place last night and this morning it is down to 66*. Wyeast recommends a warm start, but I am not sure if fermenting for 24hours will have any ill-effect on the flavor (esters, etc.).
Was going to harvest this and use in another APA next week, but will this yeast be too stressed? Am I better off getting another smack-pack, or am i worrying alot about nothing (usually the case)?
You will be fine harvesting and re-using the yeast. You may get a bit of fusel alcohol production and extra esters from pitching that warm and fermenting that warm for 24 hrs (especially right at the start of fermentation). I would bet some nice fruity dry hops will cover up any issues this might have caused though.