You might have heard about a Dragon Age 2 demo somehow. BioWare officially announced the existence of said demo for PC, PS3 and Xbox 360, with a launch date starting February 22. Specific dates for specific platforms weren't mentioned, but we can assume that it'll hit PSN on that date, because it's a Tuesday.
Players will get the opportunity to choose one of three character classes and explore the new location of Kirkwall for the first time, where they will meet Isabela, one of the new love interests for Hawke. They'll also get to meet Hayder's Razor, a dwarven blade that boosts health, mana and "combat abilities." This blade is the demo's parting gift to you, usable in the full game.