Looks nice,
As said above:
- Move the download button higher, right under the heading.
- Add a (fake) download count below it with a high though reasonable looking count.
- A quick javascript countdown for an increased call to action is a nice idea too.
Also, the "6.9Gb" seems huge, might put people off (but I guess this is just a random figure for the sake of the example
)
A few more ideas if you have time:
- Add some social buttons (fb like, retweet etc.) and use like exchange sites to inflate the numbers - this will also increase conversions and possibly bring you some social more traffic.
- Put a comments system at the bottom (with possibly a few real looking fake comments). You can simply use the fb's comments social plugin, really easy to implement and works wonders.
