I would doubt this to be true. Lets not forget the reason Nintendo hasn't supported real communication between DSs (besides Pictochat which, without net access, is simply a gimmick) is to avoid pottential problems with kids and strange men looking for kids, if you know what I mean.

Nintendo wouldn't make any money from a VoIP service and would only give them more problems than benefits. But a third party could easily enable a similar service; looking for compatibility with Skype and Google Talk would be a safe bet.

Then again if this new DS takes off just like the SP did, it could dramatically boost consumer awareness of mobile VoIP. But the system itself would have to be a radically different take on the DS to boost sales. I can't think of any major upgrade to the DS besides a media player that would stop people buying the current model.

You forget that Nintendo allready showed VoIP software on the DS in closed investors meetings. This is also a good reason why Nintendo hasn't launched a headset with mic yet(you know that hole next to the hole where you jack in headphones? That's for a mic). They're waiting untill that VoIP program is completly done and the possible re-design with it.

When i saw the DS in E3 2004 and heard of its features the first thing i though was that it could be used as a WiFi-using cell-phone if you jacked in a headset.

I would love it to flick open like a Sidekick revealing the touch screen underneath instead of the Sidekick's keypad.

Spong keeps saying how the DS needs to be redesigned, but the thing is, there isn't that much that can be done.

You've got a touchscreen in the bottom half, under it a DS-card port and a GBA-card port, and then you've got to find space for the battery and chipsets.
The top is necessary for the clamshell design.
And because the DS screens are already wider than high, there's no way you could get the directional pad and buttons on and still have it resemble a square.

The only thing they might be able to do is make it a bit thinner, but that's about it.

And I doubt Nintendo will try any kind of VoIP functionality, because they won't be able to offer it for free as VoIP requires significant data-throughput compared to gaming.

BTW, will it be revealed along with the super-powerful-better-than-PSP GBA2 that was scheduled for last year? (I'm soory, I just couldn't restrain myself)