You said...."My fiance and I are thinking about getting 1:1 veiled chams. A pet store we get our crickets from just got in about 30 little babies - maybe 1.5-2" tops" ...IMHO,if you are planning to breed them then it would be a good idea to buy them from different parents so you aren't inbreeding.
You said..."Any suggestions?"...chameleons are not one of the easiest lizards to keep...so I would suggest that you learn as much about them as you can before you get them. Here are some sites to start with...
http://adcham.com/
http://www.chameleonnews.com/
http://www.uvguide.co.uk/skintests.htm
You said..."What should we look for in the babies?"...first of all I wouldn't recommend that you buy one that is under 3 or 4 months of age since you are new to chameleons. There is a natural mortality rate in young chameleons, and hopefully that will help you to avoid it. Look for ones that are active...eyes not shut...straight arms (no signs of MBD)...look at how they are cared for in the store, etc.
You asked..."How in the world do you make sure they eat the crickets? and do you use 1/4" or pinheads?"...the size of the cricket should be about the width of the space between the eyes of the chameleon....so it depends on the size of your chameleon. Young chameleons are always hungry so there should be no problem getting them to eat crickets. You can also offer other small insects that are usually available to buy these days.
Its important to have a UVB light or to provide exposure to direct sunlight. Neither should pass through glass or plastic. Exposure to UVB/sunlight allows the chameleon to produce vitamin D3 which allows it to use the calcium supplied in its diet.
Appropriate basking temperatures are important so that the chameleons can warm up so that they can digest their food properly, thus absorb nutrients.
Most insects have a poor ratio of calcium to phosphorous...so dusting the insects before feeding them to the chameleon with a phosphorous-free calcium powder helps to compensate for this.
Its important to gutload the insects with a nutritious diet too before feeding them to your chameleons.
I dust lightly with a vitamin powder twice a month too. I use one with a beta carotene source of vitamin A because it can't build up in the system. Preformed vitamin A can. There is some controversy over whether chameleons can convert beta carotene or if they need preformed...so some people give them a very little bit of preformed once in a while.
When chameleons are kept under artificial light, they may need a little bit of D3/calcium powder a couple of times a month on their insects too. D3 from supplements can build up in the system so its important not to over-do it.
Hydration is important too...water can be provided by misting the cage several times a day and using a dripper. There are all kinds of foggers and misters that can be set up to run automatically too.
You are right when you say "the little guys are SOOOOOO CUTE!!!!'"...but they are delicate too.
Hope this helps!