I also use SBI for one site.. Yup, its good.. You must use it atleast once.. You will gain a lot of knowledge on the business !!!
There are a lot of papers where you get enormous knowledge. Videos,tools etc., One of the tool is onpage seo tool and i have implemented a better one at www.w3optimizer.com But the videos,papers,forums there are excellent But, remember! Only HTML sites can be hosted !! I have not found a way to come out of it when you host a site there.. I dont know how easy it is to change your host. Being an advanced web developer, I am not convinced with the site development tools and I always prefer to upload my own html. The process is lengthy. But its ok.