The site looks cool. How i wish Mint has a similar demo for new users to get a feel of the system!
There's nothing stopping you doing it yourself. I'm sure if you came up with something as clean and slick that the Mint devs would put it up without hesitation. Such is the nature of open source.
Mint Testing Team & Mint Donor #3606
KDE 4.12.0, custom preemptive kernel 3.12.5,
Intel i7 4770K @ 4.7GHz, 16GB 2666MHz XMP,
4 Samsung 840 PRO 512GB SSDs in RAID0,
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Gigabyte nVidia GTX 680 Super Overclock