Hi Lucy,
Like the website, and love the concept of encouraging more ladies in to the sport.
You will find with your wordpress blog that you start to get comments like the two you currently have.

People basically sell the service of signing up to blogs and posting hyperlinks back to other sites [to hopefully improve their Google ranking] or, as is the case on one of the comments, to link back to a clickbank hoplink. You'll probably find these types of comments endemic quite quickly. You can use some Wordpress plugins to ban them to some extend, but it may still prove problematical. You've done the right thing in setting links in comments to 'nofollow', because that should deter some of the more savvy posters from bothering [because Google doesn't follow or count those links] but you might want to look at setting 'no hyperlinks' in comments entirely.
Good work though, like it!!
Cheers
Stuart