I'm kicking myself for not doing this originally. I initially didn't do it because of cost considerations as well as the fact that I didn't ever think of running a 26/39/53 in front which would allow us to have a decent low gear with the 29T max in the rear.
I've run my Record Ultra Ergo 10's with a 28/42/54 in the front and 9 speed 11-32 in the rear - with an older style XTR rear derailleur using the cable wrap trick and then more recently SRAM X-9 modified by DaVinci to work with Campy Ergo levers. Both worked fine - but there was always a few niggling shifting issues and it took forever to dial them in as they always seemed more susceptible to cable stretch etc. My biggest problem though was with the gaps between gears, but we needed that low for the hills we do.
With my recent rear wheel failure I finally decided to pull the trigger on a Campy equipped Rolf wheel. I then purchased two Campy Veloce 10sp clusters - one 13-29 and one 11-23. While I could have bought just the 11 and 12 tooth cogs - for what I paid on eBay for the 11-23 cluster with a 11T lock ring - it was cheaper than any place I could find the 11 and 12 cogs and lock ring. I also picked up a Campy Record 10sp chain and found a NIB Campy Record Long Cage derailleur circa 2007.
I also switched my front chainrings to 26/39/53 using FSA rings and a Salsa 26T small ring since I have the older style FSA Carbon Pro Team cranks. I also installed a Jump Stop per the recommendations of the board. I've been running a Dura Ace triple upfront.
So the result of all these changes has been great! Numerically on paper we lost a very small fraction of our lowest gear - but it's not apparent at all while riding and the bike shifts so much better in part because we are running less chain, and smaller rings front and rear and with the smaller front rings we ride lower in the cluster as well.
The gaps between gears are much smaller as well and with the 10 vs 9 speeds - i've picked up more usable gears as well. Riding over the past couple weekends even my wife commented that we feel like we in the right gear all the time.
Now if Wound Up would hurry up with their redesign of the Duo Disc fork I can install my new front wheel and disc brake!!