I haven't been around in a while but I just wanted to chime in right quick about the zapper.....
It's so-so..... not, good, but not great. You definately need some sort of gun attachment to play the lightgun games though because without the ability to hold the wiimote by a 90 degree angle, it makes them less enjoyable. I got the official one because of link's crossbow training and the low price. It works well.... the analog stick is rather akward to use, but it has nothing to do with the placment and more to do with the fact that you are trying to aim the zapper and move around at the same time. This would be true of any attachment that holds the nunchuck though. This shouldn't be an issue as true lightgun games won't require anything more than a few buttons. I beleive the real reason for both controllers in the housing is the addition of two buttons for reloading and zooming, a feature required for ghost squad. The whole rig seems directly based off of the ghost squad arcade guns actually.
I'll probably end up getting one of the pistol grips snake linked to as well. They are cheap and will work well with re:uc, which apparently has a melee weapon controlled by shaking the nunchuck.
LCT is a very rushed game. It harkens back to duck hunt really. No story, no intro, no nothing. You just play the stages till time runs out and if you shoot well enough then you keep going. It's worth the price, but no more. I got it just for the game and I'm happy about that, but not overly impressed.
Anyway, the reason I wanted to chime in is because there's this whole "I can't use my nyko chargers with the zapper so I'm not buying one" b.s. floating around on the net. It's just that, b.s. First off, because the nyko battery covers bulge out a bit it does make it impossible to lock it in place, but that is the case of ALL gun attachments, save maybe on made by nyco (do they have one yet?). But the lack of common sense about this problem astounds me. Yup the wiimote won't fit with the battery cover on it, so all you do is take the frikkin thing off! No need to switch batteries or anything... once the cover is taken off the battery stays in place and the wiimote locks right in! Even if you had soem kind of loose battery, the zapper housing itself would keep the batteries from flying out.
So don't believe everything you read about this thing on the net, as some people are just dumb.

I think that the zapper is something you are either gonna love or hate. You need to try one really.