Forum Moderators: mack
With the size of the Internet at this time it's not yet possible to index all pages, and keep them up to date, for a search engine. So they have to determine in which order they'll visit sites.
Apparently your old domain was found to have frequently changing and interesting content. Which is why everything was indexed. Of your own domain this hasn't been determined yet, so it is not that interesting to index yet.
If your frontpage has been indexed you can assume the rest of the pages will follow but it will take some time. Until that happens you should continue to build your site to make sure that when that searchengines start to visit there's something good to see!
If you have a new domain.com, it will be a good while before you get the 'service' you are used to.
Meanwhile, keep building your site.
Are there links to your new domain? Is it listed in any directories? Inbound links are a key requirement for listing on Google.
For a very small, very new site, a sitemap won't make a lot of difference - but as the site grows, it will be increasingly important.
If you have the time, it's worth learning how they work and getting some practice in - a sitemap never did anyone any harm :)