Major necro.
Few days ago Terraria got patched to 1.1 version and there's a lot of new stuff added.
For instance now there are item modifiers (like in Diablo), there are new materials, new items, new sets, pumps (for water and lava), new bosses, new enemies, new land (hallow biome) which is counterpart to corruption, hardcore mode, wires which allow mechanism making, new lightning effects, new NPCs...
Game is still the same, drill there to obtain that, use that to craft this, use this to kill something, rince and repeat but it's still fun as hell.
You should try it again if you have it on steam but don't blame me because you played the game for a whole day.
I've just managed to kill pre hardcore boss who's quite scary and you need to prepare terrain to be able to fight it (took me 20 mins just to do that).