Hi I think would be an interesting idea to give to the best placed player of a tournament a particul

This could be an idea
Thanks for the attention
Best regards

To give to the best placed player of a tournament a particular icon for some days period or hours...

I agree, on the rare occassion I won a tournament (under 1500 rated) I was quite proud but no trophy ^^ Are these only given for major tournaments?

If you're asking "what trophies are there", here is a list:
http://en.lichess.org/qa/537/what-trophies-are-available

Good idea

Ok let's that become reality then....