In reply to M1EYP:
Hi Tom, working from the Spots only, it looks like 19 associations were active over the weekend: DM, EI, F, G, GI, GM, GW, HA, HB, LA, OE, OH, OK, ON, S5, SM, SV, W2, Z3
As regards band/mode combinations, on HF, all bands from 10m to 80m (except 12m) were spotted - generally with both CW and SSB where permitted by the band plan. On VHF and upwards, there were spots on 6m, 4m, 2m 70cms and 3cm (10 GHz). It looks like 40m CW was the busiest of all the band/mode combinations.
Just a comment about S2S: one difficulty I experienced on Saturday, was that many of the other summits I heard were not giving out their call signs or reference numbers; this may be fine for a chaser sitting in a shack looking at the Alerts page on SOTAwatch, but not much use to me while sitting on top of a windy mountain more than 800 metres asl!