Let's at least be clear about this, shall we? I trust Caliban's interpretations as though they came from the top of the Mountain, but I'd like to understand exactly what we're saying here.
As I see it, a caster certainly can move, cast a 1-action touch spell, and touch an opponent all in one round. This is based on the fact that the PHB specifically lists "us[ing] a touch spell on self" as a standard action, and that the PHB states that "in the same round that you cast the spell, you may also touch (or attempt to touch) the target." The PHB therefore must be suggesting that casting the spell and touching the target combine into one standard action, because the default for touching someone in combat is either an attack (a/k/a standarda action) or a standard action independent of any spellcasting. See PHB, p.151 ("You can touch one friend (or yourself) as a standard action"), while casting the spell is also a separate standard action.
Where I disagree with others on this board is in the contention that a caster can cast a regular touch spell, touch a target, cast a second quickened touch spell, and touch a target with THAT spell all in one round. I do not think that this is possible. Nor does the PHB explicitly endorse that this is possible. The relevant clause simply says: "n the same round that you cast the spell, you may also touch (or attempt to touch) the target." It does not say that a lack of remaining actions in the round has no effect on combining a touch spell and touch in the same round. I am inclined to believe that while the casting of a 1-action (or quickened) touch spell can be subsumed into a touch attack, the touch attack cannot be subsumed into a quickened spell as a free action. IMHO, it's simply illogical. Does this mean that if I'm a monk, I can deliver a quickened spell with an unarmed attack after taking all of my iterative attacks for the round?
IOW, I think that touch spell + touch + quickened touch spell + move is fine for a round, but that the caster has to wait until his next turn to touch an opponent and deliver the quickened touch spell.