On September 30th 2008 (after 23 months)

Software sales - Wii = 229.85 million
http://en.wikipedia.org/wiki/List_of_best_selling_video_games#Wii

Hardware Sales
34.55
http://en.wikipedia.org/wiki/Wii

Attach Ratio
6.6

Wii Sports sales
30.87

Attach Ratio without Wii Sports (without even japanese wii Sports, which isn't bundled)
5.8

Attach ratio according to this source
5.5

So infact, not only does it not include Wii Sports, it's also off by 0.3 anyway
Attach ratio

Oh c'mon you give a game (yes 10$ is giving a game for me) and then you're surprised it sells like hot cakes?

Tremble: The point is so what if it's a different price? Spongebob is $10 bucks and i don't see that being snapped up

Wow. It's ahead of PS3...

Well ... Imagine that there are many wiimote+game bundles, do you think that everybody (and I mean everybody) would pick the wiiplay bundle? No of course not, so the point is, you wanna buy a wiimote, you go to wallmart and there you see: wiimote 40$, wiimote+game 50$ (instead of 40$+50$), wich one do you pick?

It's like eyecreate wish is given with the ps3camera, it's not tracked cause it's given...

There are a lot of 20$ Xbox 360 games like Viva Pinata. It's not much different than Wii Play.

Ayayay...so much ignorance in so few words.

Okay, the NPD does not count bundled software titles as sold. This article is based exclusively on NPD data. So Wii Sports is not, in fact, included in the tie ratio here. It's not included in any NPD data, as far as I know, which is why it never shows up on the NPD charts. Additionally, when Nintendo itself released tie ratio data back in the summer, it had roughly the same number, and made it explicitly clear that Wii Sports does not count. (Does anyone have the link, by chance?)

Conclusion: Wii Sports does not count. You're the only one here who thinks it does. Your un-linked source is terrible: it claims that Wii Play has somehow sold 15.9 million copies in the U.S. alone, whereas the Wii itself has sold less than that. Consider finding a source that has some idea of what it's talking about, please. Until you come forth with convincing evidence, Wii Sports is not part of the tie ratio.

Second...

Bravo, you've moved on from the old argument that the game only sells because it's the only way to buy a wiimote. Problem is, Wii Play is one of the most played games on the system.

http://kotaku.com/5018904/nintendo-channel-reveals-hard-truths-about-wii-play-boom-blox-more

"To wit: did you think people only bought Wii Play for the remote? If so, you're wrong. The Nintendo Channel reports that its data-sharing users have played this game for more then four million hours, averaging nine hours per person. They're actually playing this game! The channel also indicates that people who own or rented Wii Play have played it an average of 9.75 times. So much for the remote theory."

You're 0 for 2, mate. One more strike, and you're out.

I didn't bought Wii Play and have 3 controllers. The reason? I really don't care of the game. As cOrd said, I prefer to keep the money for VC or WiiWare games or just save it.

Is eyecreate optional software that costs extra? That's what Wii Play is. Again, I did not buy it, and millions have done the same.

Also, note: In Japan, Wii Sports costs about the price of a normal game (~$40 I believe). It outsold Wii Play there. That should tell you something.

Well I played a lot my psone demo disc a long time ago, does it count as a game? This argument "people play wiisports" is pretty stupid IMO...