hi, just bought a laptop.....more for a personal use than for trading. question i have is what's the difference between USB/express/PMCIA card? I'm looking to use Verizon for this. they also have plans for $39.99(50mb) or $59.99(5G of downlaods), does any know know the difference b/w these? or is there a better deal by verizon when it comes to using broadband cards? thx