I already put in a couple orders, myself. Most of my stuff came from Victory Seeds. They have a pretty good selection of heirlooms to pick from - especially peppers and tomatoes. I used to just get the 20 cent packets from our local farm store, but Victory Seeds is family run, and I like to support those kind of operations. In the past, Ive also ordered some stuff from Gurney's and Schumway. If you look closely, you can see some of those big mail-order operations are all part of the same big company. I think Jung's, Schumway, and Vermont Bean Seed Co. are all the same company. Gurney's and Henry Field's are the same, too. Not that they don't have good product - I just like supporting the little guys.
This year, I'm going with mostly Beefsteak and Roma tomatoes. I have a few other varieties to try out, just for kicks and grins. For peppers, I use California Wonder green peppers. I had fairly good luck with some Biggie Chile peppers last year, so I'm gonna put out some Ancho and Jalepeno peppers as well. I usually use local seed potatoes and onion sets, but I got some onion seeds this year. I was thinking I'd try making my own sets this year (as if I need another source of frustration). Other than that, my garden consists of the usual - greens, peas, beans, radish, sweet corn, cukes, zucchini, acorn squash, pumpkins, and melons.
I have a couple tables in a spare room that I use for starting tomato and pepper seedlings. My grow lights are pretty simple - I just hung a 4' florescent fixture over each table. That gives me just enough room to set up 8 of those Jiffy seed starting trays....which is waaaay more plants than I even know what to do with. Go big or go home, right? Anyway, Ill be starting those onions any day now. The peppers and tomatoes will get started around mid march, so the plants will be ready to be transplanted in late April or early May.