Links...

Anvil Studio:Free Music Notation Software.
SheetMusicPlus: Large selection of sheet music.
MySheetMusic: Selection of free sheet music and purchasable digital sheet music avaliable.
Music Notes: Previewable sheet music for digital purchase or regular purchase.
Nissimo: More sheet music.
8Notes: More and more sheet music.
Andante: Pretty much everything classical.
MusicaViva: Sheet Music Archive.
Steinway and Sons: Best piano manufacturer in the world.
Kawai: Manufacturer of pianos.
Baldwin: Manufacturer of pianos.
Bosendorfer: Manufacturer of pianos.
Yamaha: Manufacturer of pianos.
Piano.com: Piano!

YouSendIt: To upload pictures or sound files temporarily.
Photobucket: To upload pictures in your own albums.
1ASPHost: To upload anything you want in your own account.