I have had the edge now for about a month, enough time to know it and here is my thoughts:
First, kudos for thinking outside the box, I think the idea is a genius one...who ever came up with this, the person with the spark; good job !!!
Second, even though reviews show it as bulky, and it is a little bit, the convenience and versatility is worth the little bit of weight. I was thinking of a I pad at first, but when reading that it didn't even have a SD slot and it was all locked to apple, i wanted something different. I found the edge and i am glad that i bought it....so far
My concerns:
The price tag was steep, it was a gamble and here is why:
Your a young company going into a market full of big boys, your also competing in two markets, I pad type markets and E ink markets. This both gives the edge a advantage and a disadvantage. My concern is that you will not be able to keep up with both sides. While the e-reader is easy for books and such, Sony compatible, i have had plenty of options for books; its the LCD side that is a concern.
First, it doesn't play many movies on the internet, Flash is not fully supported and it quirks out alot. That leaves just the web, a desktop or notebook is far more efficient at it. while it is nice to be able to browse the web, i rarely do so; some minor tweaks i think can fix this; for example, opening up the bar to scroll up and down so i don't need to find a clear space on the web page... i am always clicking on links when scrolling; this is also a problem throughout the edge, library, apps, all that.
Second, I really feel like the software is half done, android 2.2 is out, but there seems to be no movement towards that; if the edge software stays in its form, the money would not be worth it; as it stands now, i mostly use the e-reader side; this must change to justify the money.
Third, application compatibility; I know we where promised a market but there is no news, there is also a promise of a developing kit, also no news. Stagnation makes me concerned, i am a American and i don't like to wait because i am spoiled hehe

but i will wait, i just like to see that it is coming along, that progress is in the works. I dont see this; It is annoying jumping through hoops to get a android app to work, id like to see better compatibility.
I know that my expectations are more complex then me as a consumer can see, and i really do like the design and the idea, but, entourage needs to step up there game a little bit; the market they are competing in is going to explode soon with many company's coming out with ideas, the last thing i want to see is entourage fail and I need to buy another product to fill my geeky wants. So please, please get ahead of the game (moving to android 2.2 for one) as very soon, the edge will not be one of the few great ideas, there will be alot of options.
The potential of the edge is HUGE, so much so that it didn't take me much time to decide to buy it; and i am glad i did but the software is key to this, not just the hardware. So far though, thumbs up