You won't have to worry about an 'improved' one coming out. After plunking down the cash and being unhappy with the light, I had a few emails with C-D. They said something along the lines of the tritium illumination they use is adequate, and they weren't able to do the vials which some other watches have. When I pressed them on this, I got the impression from the person I was speaking with that they knew of the inadequacy, but some corporate suit was concerned about lawsuits should "liquid concentrate tritium" be released in a breakage. So, while I guess they'd 'like' to fix the problem, they *can't*. If you notice, all of their lines, even ones that are larger and have a deeper face that could accomodate vials, don't.
I blame the "McDonald's Hot Coffee Lawsuit" for this mentality.
Enjoy your watch...just remember to keep it dry when the alarm is on, and make sure down the road the jeweler doesn't tear the gasket.
And you wear it on calls? Man...you're braver than I am! <img src="images/graemlins/shocked.gif" alt="" />