Thanks Manu (BlueQuark), for the compliment. We do not dynamically connect to any database. We just do custom search engine crawling, like for instance Google News (which crawls news sites) or Technorati (which crawls blog sites), and present the same publicly available distributed information in an aggregated manner. We, of course, also do post-processing of the raw data, sanitize it, aggregate it with info from other places, and so forth.
Most search sites, including Google and Bing, work in a similar fashion, where post-processing of the information is done to remove spam and duplicate/spurious content. The companies you mentioned, in all probability, might be functioning similarly. One difference here is that we also do a lot of laborious manual corrections, incorporating the...
more... suggestions of our blogger community.
So, quite a lot of info on this site is originally created from direct first-hand information provided by train travellers/bloggers. Our experienced bloggers and admins are involved with trains/Indian Railways on a day-to-day basis (either professionally or as a hobby), and their inputs are incorporated into the info provided.
All the best with your endeavour.