Hi, for the past year I've been working on a sci-fi strategy game with my brother. It is finally ready to share with the world in the form of a lengthy playable demo:
Light of Altair PC DemoYou can play the first three missions of the game (several hours of gameplay!), and also part of a mission late in the game to get a real taste of combat and tactics.
There are two difficulty modes, so if you beat 'Normal' and feel unchallenged - try Hard mode and prepare for a beating in the late-game mission!

Ship combat is focused on equipping and designing your fleet, then watching the combat play out in orbit over your planets.
Your fleets gain experience and unlock new weapons technologies the more they fight.

Colony building is at the core of the game, and while you start off with a single planet to develop, in the end you control many systems at once - but you never get bogged down with micromanagement - the colonies need you to develop, but will maintain themselves pretty well without you while you are expanding elsewhere or fighting a war against a rival faction.
More information, backstory and PR stuff can be found on our website
http://www.saintxi.comEdit: We've got a new interview up on other-gaming.com, with lots more about where this game came from, the gameplay and our experiences with the launch so far:
Reido Interviews SaintXi about Light of Altair on OtherGaming.com