IndieDB isn't just a place where you can build hype for your game: it aims to be the definitive place where you should. Everything about the site's features and interface are designed to help devs present themselves, and to kindle user interest in new games.
Your game on IndieDB has a popularity ranking, but it considers only the past 24 hours, making it only good for noticing spikes in attention. Individual pages have hit counters, which can provide a more lasting record of interest but must be tracked and compared manually.
TIGSource Forums are designed to support a community of developers, not as an ideal marketing platform. Like most forums, you can start new topics and have limited control over the formatting of your own posts only.