Can I still free more RAM?

It's my first time running a LEB on my own.
I just installed Nginx, MySQL, PHP.
I am running one very new Wordpress site, no visitors yet.
But my RAM usage is already 100+MB.
I was wondering what do you think of this stats.
Is there something there that I should disable or adjust?

!(http://i47.tinypic.com/34zzrdh.png)