@Beldin:
You have basically described how I believe enchantments to work. If this was your intention, then we wouldn't really need to define "event". We'd have a solid rule as to when enchantments can and can not be revealed. Immediately after a phase, step, or activation, which are all well defined terms.
The one part I disagree with is after a ready marker is used, as that implies that players can respond between flipping the marker and actually resolving the effect that the marker indicates, which I do not believe is the case. Ready markers also aren't really a type of occurrence unto themselves. They are used to remind you of any limited use effect that you may have.
It is important also to note that with 4th edition, all enchantments can now be revealed between the steps of a Movement Action. There is also the possibility for some enchantments to be revealed between the steps of Revealing an Enchantment (currently only [mwcard=FWE08]Mind Shield[/mwcard]) but only when they specifically indicate so.
@DaveW:
This just goes to show the type of confusion this ruling has wrought and why we should ignore it. If we allowed enchantments to be revealed after an "event" then there is nothing in the rules to say that Kelanen's method is incorrect. Who is to say that rolling the die and applying the damage aren't two separate events? Indeed, there seems to be support for that kind of judgement based on them being two separate steps during combat. Since we don't know what an event is, it is all up to interpretation and using what we know about how the game works in other cases. The fact that we are seeing differing opinions on these things, which most of us take for granted, just stresses how bad a call this is. We need to forget about "events" and just go with the rule that enchantments can only be revealed immediately after a phase, step, or activation.
Anything else just seems like a major rules headache to me.