Dire Bare
Legend
The Warforged article in Dragon isn't a Playtest, it's a full, official write-up. Or at least that's what is was meant to be, before WotC decided they just had to change it and put it in the EPG. But originally, it was official.
Yes and no. The article, "Playing Warforged" was not labeled as a "playtest" article, but that was the general intent. That article was so popular it basically convinced WotC to offer more playtests, basically created a recurring feature in the magazine. The warforged race was always planned for the Eberron Player's Guide coming out this summer, it was not a change due to the popularity of the article.
And either way, it's always been "official"!! Everything published in Dragon and Dungeon is official . . . but if it is labeled as a playtest, that just means it might change significantly between it's initial introduction and the later product it's scheduled to appear in.