I set up last night with the skies looking none too promising - some high haze and a few clouds, with a forecast of mist forming. I decided to persevere and chose an "easy" target - the Double Cluster in Perseus. Luckily the skies cleared up quite a bit after about half an hour (I had to discard the first three subs) and I was able to collect 2h 20mins in 5min subs, 30 flats and 30 darks from the dark library were used. There is still a little "softness" due to the high haze but at least I got an image!
SW ED120 APO, HEQ5, EQMOD, ST80 QHY5 guiding via PHD, Modded Canon 1000D ISO 800, SW LP filter, 5min subs. Processed in DSS and PS CS5.