I see them down there. They're new. How do they work? What are they for? What do you do with them?
I have an idea, but I need to spelled out. 
These are for "Social Bookmarking" - a phenomenon which, together with Blogs, RSS, Wikis, Podcasts etc forms what is usually refered to as Web 2.0.
To get a short explanation, click the little "ADD TO" text to the left of the row of icons.
If you are not yet using any social bookmarking site it might be time to get started, but don't get overwhelmed by the many different sites/services. Start off with one of the most common, for exampe
https://del.icio.usAnd while we're on the subject, what happened to the quick page up and down buttons - now I have to scroll down to the bottom of the pages and back up - annoying.
We removed them because we thought no one was using them...

("Page Up/Down" on the keyboard does pretty much the same thing.)
But if you used them we will of course put them back!
I tried to send a message to the moderator but when I click on contact (Pianostreet.com/contact.php etc.) all I get is the mailing address in Stockholm and the phone number - no screen to type in a message. What's going on??
The contact form was removed some time ago because of problems with spam and the problem that many users asked questions but were not leaving a correct email addess for replies.
Anyway, you are always welcome to give us a call or visit our office if you happen to drop by Stockholm but why not send us an email? The email address actually appears twice on the
www.pianostreet.com/contact.php page (to make sure no one is missing it.)
We have also recently added a support chat on the "my account" and "sign up" pages which you can use to contact us if email is not your prefered choice.