Can't login to Thesis WordPress site

Hi –

I tried to log into my Thesis site today and it will not accept my stored username and password. I keep getting the message that the password is incorrect. When I try to reset the password, nothing is arriving in my email inbox.

Could someone have hacked into my site and changed the login details and the email address?

If so, what can I do about it to get access again?

I have Hostgator hosting and I think the version of wordpress is 2.9.2 – although I am not sure (it is definitely not 3.0)

The site in question is http://www.bestwebbermarketing.com

Thanks!!