Calendula & Concrete - This is a blog by a woman who has a plot in a community garden in northwest Washington, DC. Here wiriting style is really good and her pictures are fabulous.
Brent and Becky's is a place in Gloucester, Virginia that deals exclusively with bulbs.
Territorial Seeds - A seed company out in Oregon that I order lots of seeds from every year.
Pinetree Seeds - A seed company up in Maine that I order loads of seeds from.
Heirloom Seeds - This is a seed company that specializes in heirloom seeds, hence the name. I bought all sorts of different lettuces and salad mixes from them. Luda and I planted them in late February and we fed on the results from late March through early July when the last of the lettuce plants bolted. I'll plant another batch in mid to late August for the fall. The heirloom lettuce was delicious and there were many unusual colors, tastes and textures coming out of our garden and going into our salad bowl.