I don't really know much about VPNs, but would something like that be feasible? Since it's only for miners, it won't need much bandwidth.
People with ati cards on their notebooks could happily leave it mining while at work or school. The service could be paid in bitcoins too.

What do you think?

Eight BTC per month is too much for something I will only use with a miner. That service has unlimited bandwidth and even supports bittorrent!

That's why I was thinking about some much cheaper version offering only limited bandwidth and maybe only allowing miners.

Last time I checked it was 6 BTC per week.

Anyways, why don't you use a free vpn service for that ?