The Korg A3 was relatively new when he got it and began using it for Achtung Baby (and Zooropa). The Korg SDD-3000 was a fairly new item when he started using it. His 1976 Gibson Explorer was a mere 2 years old when he bought it... and his original "Blackie" Strat was off the shelf and only a few years old when he bought that.
Edge does use vintage gear but it wasn't necessarily 'vintage' when he first got it.
Case in point... The Line 6 distortion modeler. A fairly new item that he went as far as to have Line 6 make a rack mount version for him. And his use of the Line 6 Variax 700 modeling acoustic assuredly help sell more of them for Line 6 (for those not in the know, the Variax 700 being the guitars used for "The Fly" and "Love and Peace" during the Vertigo tour.
So what might Edge look in to using? I am sure we could all make a laundry list. But after seeing Muse's HAARP DVD... Manson guitars might be a place to look.
They make some interesting things and make them to order. Matt Bellamy has various effects built into his Manson guitars.
Like the Kaoss Pad on a few:



What's a Kaoss Pad? Follow the link for a bit more:
http://www.korg.com/gear/info.asp?a_prod_no=kp2
http://www.zzounds.com/item--KORKP3
Bellamy also has Z-Vex Fuzz Factory fuzz effects built into some of his guitars.
Not saying that Edge should copy the models that Bellamy has... although I am sure Edge could make interesting use of many of Bellamy's models... but Manson could build some interesting tone crazy goodness for The Edge too.
Now what DID I do with Dallas' phone number...
 
         
 