I'd like to invite everyone to read through the seed starting info on my website.
http://www.selectedplants.com/seedlings.htm
I would also like to emphasize two critical points about growing seedlings.
1. Always start with sterile seed start mix.
2. Always cover the planted seed with a sheet of plastic or a bag or a plastic cover to prevent evaporative cooling.
One of the little "GOTCHA'S" addressed by Craig's method is that he covers the trays with saran wrap. This does two things. It keeps the moisture where it is needed next to the seed and it prevents evaporative cooling. If you do not cover your seed after they are planted, the soil surface can easily be 15 degrees cooler than the ambient temperature. This can take your 72 degree home temperature all the way down to 58 degrees which can be the death knell for tomato seed.
DarJones