Welcome to WebmasterWorld Guest from 18.104.22.168
I loaded a new subdomain on 27/3 and today I noticed from my logs that its pages are coming up in Google searches, just a week later. This is a record for me.
I have not used trusted feeds but the other option would be to get a link from a frequently crawled page.
The only factor on how quickly your pages get indexed is how often your site gets crawled.
If you want to get your new pages indexed, then make sure they are linked to from top level pages in your site and Googlebot will find them as soon as possible. There's not a lot else you can do to force the situation.
The more regularly you update content (particularly Homepage), the more frequently Googlebot will visit. But that's a longer term solution and doesn't help right now - your site is being indexed x times per month and there's not a lot you can do to increase that in the short term.
PageRank doesn't help your site get indexed faster. The only way it may seem to help is that a high PR site is likely to be crawled more frequently as they are larger and probably adding regular content.
More inbound links won't help your site get indexed faster (well, more inbound links mean more chance of Googlebot finding your new content sooner, but chances are that any link will get your site indexed soon enough).
Links from the same IP range - do have an impact on ranking - it is debatable just how much of an impact they will have though (probably less impact than links from other IPs).