Peter, I was actually glad that you started that thread, I had started the Project Euler problems to go back to some sort of fun programing and stopped after I could not find an algorithm that made my code faster for problem 10 I think. So seeing your thread made me want to go back to it.
There are probably ways to promote Project Euler here while respecting their intentions. It may be less interactive but still worth it.
We're a place where coders share, stay up-to-date and grow their careers.
We strive for transparency and don't collect excess data.