Big busy Saturday morning and afternoon at the Triple-X Olympiad. Some highlights:

The men's 400 metres heats. Oscar Pistorius makes his historic first appearance on the track, cruising through the opening heat with a time of 45.44. Lashawn Merritt broke down and failed to finish in his heat.

Round One of the men's 100 metres. The seven heats were won respectively by: Tyson Gay (10.08), Justin Gatlin (9.97), Ryan Bailey (9.88), Usain Bolt (10.09), Asafa Powell (10.04), Yohan Blake (10.00), Dwain Chambers (10.02). No need for Bolt, or any of the lead contenders, to break out a sweat. But Chambers' heat was marred by the shock withdrawal before the race of Kim Collins, disciplined by the St Kitts Nevis officials for leaving the Olympic village to spend last night with his wife and kids. Collins has today effectively announced his retirement on Twitter.

Women's triathlon: Nicola Sprig won Switzerland's first gold medal of the Games, beating Sweden's Lisa Norden. Check out this photo-finish.

Women's single sculls: Huge win to Miroslava Knapkova of the Czech Republic. [Hopefully I'll link to a decent story on this on Sunday.]

Two more golds to Great Britain at Eton Dorney on the final day of the rowing, beating Australia - who have now attained double figures on the silver medal count - in the men's fours. GB have now surpassed South Korea on the gold medal tally.

India has taken bronze in the badminton women's singles to take their medal count to three - equalling their best-ever at Beijing 2008. Of the 54 nations to have won medals to date, India ranks 54th in medals per capita. (New Zealand is 1st, Australia 3rd.)

Back to Friday night and Dong Dong won the men's trampoline for China. Here he is in action in the 2011 World Championships: