Blog posts and new pages posted on our sites are indexed in less than 10 minutes
Even the indexing here on the HD Forums are pretty quick.
There's a big difference between an established site getting a return visit with active content, and then an established site with changes happening only every few weeks (or months) and a HUGE difference if they've never been indexed before.
A few hours is a good turn around, a week is about normal for many sites, and definitely longer if it's a brand new site/domain.
As suggested, setup a google XML sitemap, activate through Google Webmaster and you'll see results.