These courses are a good place to start if you want to learn about how to use O2:
- Thu 10th Jun, London: Introduction to the OWASP O2 Platform
- Fri 11th Jun, London: Black-Box & White-Box ASP.NET Security Reviews using the OWASP O2 Platform
- Thu 17th Jun, London: Introduction to the OWASP O2 Platform
- Fri 18th Jun, London: Black-Box & White-Box ASP.NET Security Reviews using the OWASP O2 Platform
Note that this is not an OWASP delivered course and it not related to the OWASP Foundation (I'm organizing this independently)