Speaking of the Summer of Arcade stuff though, I would also recommend Insanely Twisted Shadow Planet (Metroidvania with a spaceship) and From Dust (super awesome god game). The latter is also available on Steam as of a few days ago, but it has some major DRM issues and I encourage everyone to opt for the console version instead.
Phoenix Wright: Ace Attorney
Phoenix Wright: Ace Attorney Justice For All
Phoenix Wright: Ace Attorney Trials and Tribulations
Apollo Justice: Ace Attorney
Ace Attorney Investigations: Miles Edgeworth
Advance Wars: Days of Ruin
Advance Wars: Dual Strike
Animal Crossing: Wild World
Chibi-Robo: Park Patrol
Custom Robo Arena
Feel the Magic: XY/XX
Final Fantasy III
Final Fantasy Tactics A2
Fire Emblem: Shadow Dragon
Fullmetal Alchemist: Dual Sympathy
Ghost Trick: Phantom Detective
Henry Hatsworth in the Puzzling Adventure
Hotel Dusk: Room 215
Kirby: Canvas Curse
Legend of Zelda: Phantom Hourglass (The)
Legend of Zelda: Spirit Tracks (The)
Mario & Luigi: Partners in Time
Mario Hoops 3 on 3
Mario Kart DS
Mario vs. Donkey Kong 2: March of the Minis
MegaMan Battle Network 5: Double Team
Pokemon Pearl Version
Pokemon SoulSilver Version
Pokemon White Version
Professor Layton and the Curious Village
Professor Layton and the Diabolical Box
Professor Layton and the Unwound Future
Star Fox Command
Super Mario 64 DS
Urbz: Sims in the City (The)
Viewtiful Joe: Double Trouble!
Yoshi's Island DS
That's 48 not counting the Metroid demo that came with the 3DS.... I'd have 50 games if you count that and OoT 3D as a DS game. Even more if you count the DSi and Virtual Console downloads on 3DS.
Note that I do NOT recommend a game simply if it is in my collection.
There are several games on that list that I am ashamed to own (Spider-Man 2, Fullmetal Alchemist, the Urbz... stuff like that were gifts many years ago from family), and many games that seem odd (Feel the Magic is probably the most unexpected title for someone to see on my shelf, but in my defense, that was when the DS just came out, had no games, and I heard this game was like WarioWare, so I bought it out of desperation).
Spectrobes sucks so hard it wasn't worth the six bucks I paid for it, I haven't played more than ten minutes of it.
Other than the ones I just mentioned, most of the other games on my shelf range from at least tolerable to awesome.
I also do have a running list of DS games I plan to track down, including some Castlevanias, some Atlus games, and some other miscellaneous stuff.
It's made my boner for suda51 get even bigger, I ♥♥♥♥ing love this game. The music is solid (forgot who made it, the guy who did the music for Silent Hill 2 right?), the combat feels great thanks to Mr. Shinji Mikami, and it's got suda51's personality and quirks written all over it.
It doesn't take itself too seriously and it still manages to be interesting enough for me to actually want to watch the cutscenes.
The Torchlight demo is fantastic. Perfect demo, showcases all kinds of different gameplay options and a good long stretch of dungeoning and/or questing. The Bastion people could learn a thing or two about how to make a good demo.
Of course, since I don't have a MotionPlus unit, there's that to be accounted for.
So Skyward Sword could potentially be more expensive anyway.
EDIT: Or to avoid tax altogether I can just drive ten minutes to New Hampshire and buy it there. It's not really evading tax at all because the stores there potentially are the closest places for me to shop. Then again there's gas to take into account.
This is why so many of my games are used games, like half my library of GameCube and Wii games cost under $5 each
So far I'm looking at Skyward Sword, Uncharted 3, ACR, Journey, and Skyrim.
I'm sort of getting into Oblivion now, so I may not want to miss Skyrim. Luckily, me and my brother will split the bill, but November will drain my wallet a bit.
Not sure if Journey will be up for download this November, though. It'd have a nicer price tag for sure.
EDIT: BTW, Deus Ex. Not sure what to think about that game, but it's tempting.