First off, welcome to Sitepoint!
Second, be patient, it takes time for your blog to be listed and It has nothing to do with it being wordpress as compared to your main site, which is in html.
also, submitting to Google isn't nearly enough, you need to start getting the word out, do some link building activities (don't spam other blogs and forums), carefully select the places to target for your link building activities. The first thing you should've done is to link from your actual site to your blog (you have one, but that's hardly to be seen). Even include a list of most recent articles in a block on the left-hand side.
There's an awful lot more you can do with Wordpress, starting with proper URL/permalink structure instead of ?p=1, and blogging in general - and a few things you can do on your main site - but unfortunately I don't have the time right now to go into much details.