Considering how many people play Eve, its a bit surprising this forum isnt more active?
the most notable changes i can think of, is the speed nerf, and how speed affects combat.
stacking mods doesnt work as well as it used to, and using MWD's now increases your sig radius by 500 percent, which means your far easier to hit, and missiles do more damage.
interceptors and frigates are probably the fastest things around now, have a speed fit Vaga that i've refitted to use an AB, which does around 1400 m/s, this reduces the amount of damage a missile does when it hits, and also makes you harder to hit with turrets, (fitting a tracking disruptor works wonders btw)
so, briefly, speed bonuses dont stack the same, some of the rigs have had their values/properties changed, sig radius and speed affect damage.
hope that helps...