| Micah Urich |
VERY BLACK AND WHITE!
First off read the haste spell and speed weapon property to become familiar with them.
Second note that speed weapon ability states "When making a full attack, the wielder of a speed weapon may make one extra attack with IT." Then all of the extra mumbo jumbo tied to it INCLUDING the not stacking with similar effects like haste. Now for all of those who might be getting confused at this point (since this is the point of the argument conflict stemming from the interaction) the weapon confers the extra attack with it, not the player getting an extra attack with any weapon. So that means that two speed weapons WILL grant your fighter, rogue, barb, monk (flurrying and two weapon fighting with 2 kamas [which is 10 attacks at higher non epic levels]) the two extra attacks at whatever point they are at on the two weapon fighting chain.
Now for the fun part...
Third if you are thrifty and only possess one speed weapon and wield two weapons and have a arcane caster that knows haste or can even cast haste on yourself you get something special as outlined in the haste spell. You will get "...one extra attack with any weapon he/she is holding." IF you have a speed weapon the extra attack cannot be applied to it because of no stacking but it can be applied to your +1 frost dagger in your offhand.
The way the interaction works is that they didn't want people using two speed weapons and throwing a haste to then get all of the bonuses with a character with all of the things they would have to shred a "challenging" encounter in one round.
Side note:
Coin is hard to come by except higher levels... So When you are higher in level and have your speed weapons it just gives you a greater chance to defeat your enemies with those attacks seeing as how the last attacks in the chain would most likely not hit.
Hope this was helpful! Have a good one!