I'm far behind some here, but right on schedule for my climate zone. My tomato seeds were planted indoors on March 15, three to each cell of plastic egg cartons filled with Jiffy Mix. I'm keeping it simple this year, only growing F3 generation Strains #1, #3, and #4 of the Dr. Wyche's Yellow x German Red Strawberry cross I did in 2009, plus Big Beef Hybrid and Ozark Pink Hybrid.
I've done the first transplant, into 3" plastic squares in flats filled with MiracleGro Potting Mix. I do this first transplant very early, often before the first two real leaves have formed, because there are three seedlings per egg-carton cell and I raise ALL of them for spares and to give away to friends and family. This first transplant is microsurgery, but I've found that the seedlings do fine this way.
These tomatoes will go outside for hardening off the last week of April and be transplanted into the garden the first week of May.