You can get soba noodles in the oriental section of the grocery store, but they're really expensive; they're a lot cheaper in specialty asian shops.
Cook the soba noodles according to directions; drain and rinse with cold water. Meanwhile, toast some sesame seeds. Toss the noodles with chopped green garlic, chopped chives, julienned carrots, julienned cucumber, and whatever other veggies you fancy (cabbage works well). Toss with 5 T soy sauce, 5 T rice vinegar, 1 T honey and 1 T sesame oil. Top with sesame seeds. Serve cold.