Any good Aquaman comics for someone who doesn't know anything about him? Preferably something new
If you want something more recent, the New 52 Aquaman is a good place to start.
"The relaunched series cements Aquaman's status as the half-human son of Tom Curry and Atlanna, and sees him return to Amnesty Bay along with Mera. Greatly distressed by the harsh treatment given to the oceans during his time as ruler of Atlantis, Aquaman decides to abdicate the Atlantean throne and return to full-time heroics. However, he now struggles with his lack of reputation with the greater public, which views him as a lesser metahuman with less impressive powers than those of his peers."
But if you want the best Aquaman stories, go for Peter David's popular run, Vol. 5 issue 1 to 46.
"Writer Peter David began by giving Aquaman an entirely new look, forsaking his former clean-cut appearance. Following his discoveries reading the Atlantis Chronicles during the Time and Tide series, Aquaman withdraws from the world for a time. Garth finds him weeks later, with his hair and beard grown long, brooding in his cave. Soon after (vol. 5, #2, Sept. 1994), Aquaman loses his left hand when the madman Charybdis steals his ability to communicate with sea life and sticks Arthur's hand into a piranha-infested pool. This causes Aquaman to become somewhat unhinged, and he begins having prophetic dreams, and then, in need of a "symbol", attaches a harpoon spearhead to his left arm in place of his missing hand. His classic orange shirt is shredded in a battle with Lobo (#4), and rather than replace it he goes shirtless for a while before donning a gladiatorial manica (#5). After the destruction of the harpoon (#8), Aquaman has it replaced with a cybernetic prosthetic from S.T.A.R. Labs (#9). This new harpoon has a retractable reel that he can fully control."
http://en.wikipedia.org/wiki/Aquaman#New_direction