yup 10+spell lvl + wis mod for cleric spell dc. Just one thing that I found kinda odd tho, my cleric had uhm some dc on his storm, a cleric archer with nice wisom, but when I counted up the dc I found that the dc was 2 higher then what it was supposed to be.... maybe a little bug, but not of much importance.
50 is max wisdom I guess (18 (start off with this) + 10 (ability points) + 10 (feats) + 12 (items)
so 9+20+10 = 39, but that means the max dc should be 45 with the three focus feats..... and I know for a fact that 47 is possible and have heard ppl have had 48.
seems impossible if you follow the rules...