Found my old mousepad from Minecon 2011 with signatures from some of the original content creators and devs. It may not be the same game as it was then, but these were
Minecraft Grass & Dirt Design RGB Mouse Pad XL Desktop Mat
Minecraft mousepad - Etsy
Minecraft Creeper Musmatta
Evolution of Minecraft gaming vinyl XXL mouse pad - TenStickers
Custom Minecraft Mouse Pad 30"x16" | MyCustomMousePad
Minecraft - Gaming Musmatta XL, 30 x 80 cm | Kalaskungen.com
Minecraft Creeper XL | musmatta.nu
Poster Minecraft – Overworld Steve & Alex | musmatta.nu
Minecraft Legends Musmatta
Must-Have For Minecraft Fans: Grass Block Mousepad | TechCrunch