The plants will freeze enroute. You'd be much safer just sprouting seeds indoors under lights. Red Robbins are small and nice and can grow nicely sprouted in early January under lights. They are indeterminates and you can place them outside when your weather warms and they will produce all summer and then bring them back indoors in fall. I have had 3 that have lived like that for 3 years now.
~tom

Ok, thanks Tom! I think you're probably right. I'll just get them going under lights. Are they indeterminate? The descriptions I've seen say determinate.

http://davesgarden.com/guides/pf/go/74494/

lol, I think you're right. I get tiny tims and red robbins and all those nursery rhimes mixed up.
~tom

Well, I'm glad I decided to go with seeds. They emailed me back to say they didn't have any tomato plants and "maybe" would have some in a few months. I wish they'd update their website to reflect that, it would have saved me trouble. Good thing I didn't enter my credit card number!