The prices will vary depending on which store/site you use. A new Nintendo DSi is approximately $150, while a Nintendo DSi XL is approximately $170
No. XLs, (hence the name) are slightly larger than your regular DSi.
All of the DSis I've seen have cameras.
I say to you YES
so popular that 3/4 kids have a ds or dsi or dsixl. in the u.s.
The R4i will work in all DSis with the 1.0-1.3 firmware. It will NOT work it your DSi has been updated to the 1.4 firmware.
You can go on the internet, take pictures, Download games from the dsi shop, and more...
Blue, green, dark red, black and brown
No. the 3ds games have a tab on them so that they do not fit into another ds, if it went in, the game might break the dsi.
No, the promotion ended like 3 months ago, it was only for people who entered the dsi shop when they dsi had just been out! that sucks i know :]
Yes, it is likely that fewer people will buy DSi XLs now that the 3DS has been released.
Nintendo and gamefreak
No, Because DSs and DSis are not Region-Locked (So an american-american, Japanese-Japanese etc.) So it'll work, but the game will probably be in another language.