In reply to notreallyasquamishlocaleh:
Well spotted.
There were already several routes up that part of the tepui when Anne and I became interested in it in 2001 but most tackled the flanks of the falls and involved considerable steep jungle bashing for part or all of their length. Only one route climbed the main wall direct - an unrepeated A4 aid route.
On our third attempt in 2005 Anne and I led a team of British, Venezuelan and Russian climbers in making the first free ascent of the main wall (which is what Jack is referring to.) Our route - Rainbow Jambaia - was repeated the following year (laudably in similar trad style) by a European team led by Arnaud Petit.
No doubt you knew that already but the clarification may be useful for others.