Re:How Long does the base game play
My usual opponents and I tend to be fairly slow and ponderous with this one, so it usually takes about 2 hours for a normal-type scenario. However, I've only played one game thus far with the new rules (1.5). It wasn't the basic scenario, but it seemed to move along nicely. Still, I'd plan on about 2.5 hours on your first game.
Another good introductory scenario is [a="http://www.columbiagames.com/resources/8500/orcdies.shtml"]If an Orc Dies in a Forest[/a]. It plays on one map, goes fairly quickly, and is a good one to get familiar with the movement rules, terrain bonuses, and all that. However, the Orcs have a significant advantage, so the Elf player should know going in that they are likely to lose. (It's a good one to get someone into the game by letting them be the Orcs.)
Also, for the basic scenario, you can put a bit of a time limit on things by agreeing on a set number of turns. We find 10-12 makes for a good 2-hour game.