Pros:
+Larger Screen
+5 Brightness Settings, causing a better looking screen
+Thinner
+Matte Finish
+Two 0.3MP Cameras
+SD Card Slot
+Built in memory for DSiWare
^Web Browser and Moving Memopad for free
+Hot Swapping of NDS Games (No need to turn off system)
+Small but nice tweaks to Pictochat
+Built in soft-reset
+Can configure WiFi through firmware
+Arrangeable GUI
+Voice Recorder/Distorter and AAC Music Playback
Cons:
-Shorter Battery Life then Lite (Larger screen consumes more mA)
-No GBA Slot
-Uhmm.... That's all I got....Now to go more in depth for the features to make this similar to a review...
=Camera=
Yes, they are low quality, they have 0.3MP cameras where my phone has a 3.2MP. Big whoop, you aren't buying a DSi to take pictures for your art classes. But the things you can do with the camera are what make it amazing! There are the general draw on your face and add stamps to it and the cutout pictures where you can just insert your face and snap to have a Mario hat and mustache. But beyond that you can distort your face or whatever in real time, you stretch the area of the image you want moved and when you move the camera that area will stay stretched. There is face recognition for adding mustaches, glasses or even cat ears and whiskers. One feature that I was really impressed with though was the face blending. Take a picture of your face, take a picture of your friend's face, and then it will blend them together and you can choose what percent of each face you want to use causing it to blend more like one or the other. Some features I have not messed with yet are the ability to single out colors or remove colors from the picture. (Sin City Style pictures for example.) None of this is 'necessary' of course but it is very fun!
=Web Browser=
Works well, nothing truly notable with it. You can search Google or Yahoo, type in websites, add favorites and basically all the same things as you could for the old browser program. It is still an Opera based browser as well. I have not tested it on mobile youtube or flash to see what it is capable of yet.
=Moving Memopad=
Now this is an AWESOME app that they have for free. The 'boring' part of it is just a calendar where you can add notes. The real fun of it though is the animation ability. You essentially hand draw Gif animations frame by frame. It has different pencil and brush sizes, black, red and blue ink, light box mode for seeing previous frames, undo/redo, copy to new frame, ect. I have no idea what the frame limit is but I was at a friend's and made a 200 frame animation that didn't even use 1/5 of the frames it would allow. When you're done with an animation you can save it in the DSi format to the system or memory card, gif on the memory card, or upload it to the internet via WiFi direct from your DSi.If you're curious about more of the features just let me know and I'll talk about them.
Now to defend the DSi a little bit. :D
With the increase in screen size, ram and brightness, it is no wonder that the DSi gets a slightly shorter battery life. This isn't really a big deal though. You still get about 12 hours of battery life (or so I've heard) which is plenty of time to go home and charge it or find a plug to charge your DSi. "But what about road trips?" they said, Dealextreme has a car charger for the DSi for $3.30 shipped so that's the least of my concerns.
"We want the GBA!" they all shouted. Well the GBA was first released on March 21st, 2001 in Japan, USA soon after. So coming up in less than two months will the the GBA's eighth year running. I have a feeling that this isn't a necessary feature anymore. GBA games are no longer made and if you love GBA so much I'm sure you will have your GBA/GBA:SP/GBAmicro/GBPlayer/NDS/NDSLite around somewhere to keep you company. I know I do.So why internet, why do you hate the DSi so much?P.S. Any DSi connecting to teh store before March gets 1,000 DSi points.
P.P.S. There are a number of flashcards out for the DSi already. [AK2i, EZVi, R4i, TTDSi]Animation that I said something about in my post:

DSiWare Programs as of now:
http://www.dsfanboy.com/2008/12/17/ds-fanboys-dsiware-screen-round-up/

