Your dashboard will be at http://jasofitz.wordpress.com/wp-admin/
Bookmark the above link for future reference.
You can also, once you get to your dashboard, go to appearance > widgets, and drag the "meta" widget over and into one of the widget area that are on the theme you are currently using. A login link will then always be in that widget as well as a "site admin" link that will take you to your dashboard.
Since you just started, and since you purchased a domain name with things, it can take 24-72 hours for the domain name propagation to complete (although it is generally 24 hours or less) and how soon you will see your site under the domain name you chose is dependent on how often your ISP update their DNS caches.
Here are a couple of resources for you on getting started with wordpress.