When should I expect the new products for sale?

On the May/June issue of ROBOT magazine the 2.75" Omni Wheel-Double Roller and Turntable Bearing Kit are featured on the back cover. When will they be for sale? I have some remaining grant money that I have to spend before the end of the fiscal year or I lose it. Should I just wait to World Championship to assume all new products will be on sale then. Also why is the 1x2x1x15 C-Channel only sold as part of the Booster Kit?

The VEX World Championship is one of our major release milestones. Both of the products you mentioned will be available there.