RE: Mandatory Voting...
Demanding that people who for whatever reason are uninformed vote is a bad idea. The only people that should be making collective decisions for all of us are the ones who have actually considered their position and know what exactly they are supporting or opposing. If, like Dr. Midnight, you do not care to inform yourself, you are doing society a favor by not voting. There is nothing so wonderful about voting that outways the damage of done by those who vote uninformed.
RE: Electoral college
There are no Federal laws that bind the electors to vote the way that the voters tell them to, but the states are free do make such laws, and many do. However, they can only make laws to punish "faithless electors (thats the technical term)" after the fact. States cannot supersede Federal law, which gives the electors the right to vote as they see fit.
RE: Individual votes do not count
It is true that one vote does not matter. Virtually never does one vote determine an election. However, if people decided that they did not need to vote because one vote did not matter, serious problems would ensue. The paradox of voting is pretty much a huge-scale prisoners' dilemma, where if everyone thinks of themselves only (the time spent to vote has value...one vote does not), everyone suffers.
RE: The electoral college
The electoral college does indeed favor small states slightly, forcing candidates to pay attention to them. Remember that in practical terms, regional patterns of ideology and party loyalty and the nature of the two-party system itself requires candidates to pay attention to states of all sizes.
The electoral college system is also needed because it limits the power of regional interests and the interests of large population centers, which is considerable as it is. If you don't believe me, look at a district-by-district map of the 2000 presidential election. You'll see Gore (traditionally represented in blue) all along the coastlines where most of the major cities are, and Bush in most places in between except (generally) big cities. And in spite of the fact that a good look at the map makes it seem like Bush would be the overwhelming victor, Gore got slightly more popular votes!