Now, the point of this thread:
In the newly published Official D&D FAQ (v. 5/10/02), there are multiple questions about the effects of antimagic field (on p. 41).
In the first question, it is stated that an antimagic field does NOT prevent the casting of spells from within the field (only stopping the functioning of spells within the area).
In the very next question, it is stated that "the antimagic field blocks line of effect", which would have the obvious corollary that spells cannot be cast from a point inside the area to a point outside the area.
And just to top it off, another answer also added in the same version, on p. 48, in fact confirms that "you need line of effect between you and the point of origin for your spell... or to your spell’s target..."
That one's pretty hard to swallow.