Haste

[Trellian]

Actually, haste is even more powerful than that. Haste allows you to take a 5-foot step, cast a 1-action spell, and cast another 1-action spell. Really powerful spell and one of the few powerful features that spellcasters get at high level. It ends up balancing them really well against a fighter at high levels. Otherwise, fighters would forever chew through spellcasters. In my humble opinion, of course.

You can also cast a 1-action spell, cast a 1 action spell, and move your speed... right?

 

[Kershek]

You can also cast a 1-action spell, cast a 1 action spell, and move your speed... right?

Actually you're right. You get:

Normal Full Round Action
Partial Action from Haste

Expand the Full Round action to Standard action + Move-equivalent. So..

Cast (standard action)
Move your movement rate (M-E action)
Cast (partial action

W00t!

 

[EOL]

Well once your hasted you can then cast 3 spells a turn if you have spells quickened.

Quickened haste first turn, 5' step, spell, spell.

Round 2:
Quickened (whatever), 5' step, spell, spell.

Haste doesn't cheapen quicken, it makes it even scarier.
And of course haste is still the best spell to quicken.

I'm not disputing the fact that with quicken you can cast three spells but since an extra partial is almost indistinquishable from a free action it means you can use the extra partial for all the high level spells and only quicken the lower level ones.

Also Haste is most definitly not the best spell to quicken. It's only better to quicken than any spell of greater level, but if you opening spell selection is shield, haste, and displacement then you should definitely quicken shield and not haste. Because you get EXACTLY the same effect at a lower total spell level cost, and that is why it's out of whack.