Easiest way is to put it on s3. Check this article
http://docs.amazonwebservices.com/AmazonS3/latest/S3TorrentRetrieve.html
Thank-you for writing this post. This cleared up some things I did not understand about Bit torrent. It seemed like only a way to share files illegaly, but now I know it can be used for other stuff too. They really should simplify the interface so anyone can be their own tracker and share files too. I think legal uses of Bittorrent will grow with time.
I know everyone is saying Amazon S3, and that’s what I thought when I started reading the article.
But I bet you did it this way for the fun of it 
If it had done properly in the first place, I believe it would be one of the primary file sharing methods today, surpassing HTTP,FTP,e-mail attachments. But really, the interface and documentation are still in a poor state
LegalTorrents recently launched a member tracking service to anyone can use our tracking service. Details:
http://www.legaltorrents.com/about/member_self_publishing
Don’t know for sure but I think that MonoTorrent has a full features torrent tracker.
Check it out! And because it is opensource you can easily create a full featured windows service from it including statistics logging.