Great first post! Welcome to the Nexus.

DREAMS:

Seeing that every single night we all "disappear" in to a dream dimension, how does it compare to the DMT experience? Are there any similarities? 

I'd say the greatest similarity is in the ephemeral nature of the experience. Much like a dream, the details of the tryptamine trance fade very quickly upon returning. Also much like a dream, there is a lot of time dilation and a huge amount of experience is packed into the period of a few minutes. As far as content goes, there isn't a lot of similarity between the DMT hyperspace and the dream realms.

Has your breakthrough experience affected or changed this dream realm at all? 

Yes both in my personal experience and in the testimonies of members of this forum, dream experiences ramp up quite a bit for several days after high dose DMT.

As McKenna has suggested in some lectures, have any of you ever dreamed you were taking DMT and a powerful experience followed?

I haven't yet had a dream where I've smoked DMT and entered hyperspace. I have had dreams whre I get the same effect and feeling of having been in hyperspace without physically smoking DMT in the dreamspace. As an example I once had a dream where I entered into the attic of a house and was overwhelmed with fast moving sensory stimulation in the same way one is when entering hyperspace, I woke up having open eyed visuals and feeling very much like I was coming down on DMT.

DAILY LIFE, POST-BREAKTHROUGH:

Did it feel like some kind of "line was crossed" after coming back from your first breakthrough? Has it changed you?

Absolutely! My first ego death experience had much the same effect as is reported by those that experience NDE's. With the particularly unlanguagable complexity of the tryptamine space it leaves one quite astonished and convinced that the universe is orders of magnitude moar strange that you could have previously supposed, to use a Terencism. 

Does the experience now permeate your daily life in some way?

Well I do visit this site every day  The experiences I've had with DMT definitely influence my day to day life. I tend to be less wrapped up in the drama of it all and generally am able to generate compassion both toward myself and others in the recognition of how absurd it is to take this ride too seriously.

Are there any kind of "intrusions" (maybe too aggressive a word) in to your waking life from this DMT realm? I know, a bit vague but what I'm curious about is whether it feels like a some kind of gate was opened and now you can "see" or understand things you couldn't before.

I wouldn't really say that DMT effects have leaked into my daily experience. I def have a different outlook and understanding as a result of using it and I may approach situations differently as a result of that perspective. I wouldn't really say it opened some kind of gate or causes any intrusions into my every day reality. However, It certainly does lend one a different perspective knowing eternity is sitting in the gvg case in your bedroom any time you want to approach it.

Does this DMT hyper-reality feel connected to this waking reality? That whatever is happening on the "other side" is also somehow connected to our lives here?

I am wholly convinced that our every action ripples infinitely throughout the hyperspacial matrix and that the two worlds are completely intertwined. It's merely a matter of awareness. Once you know what you are looking for you can easily touch the interface when you are engaging in practices like yoga, meditation, and various forms of energy work.