Gardening: What to plant in April (Northern California)

I'm getting into gardening. Growing some of your own food is great. Today, April 10th, 2011, is a nice day and I've got my beds weeded and ready for planting, but what to plant? Here are a few guides:

NORTHERN CALIFORNIA

September: Plant marjoram, oregano, peppermint, rosemary, thyme. (Herbs can actually be planted all year in most climates.)

... April ... Plant:• Basil seedlings (Plant in batches every two weeks through August)

• Chiles (seedlings; through May)

• Corn (seed―plant in batches every two weeks through August)

• Cucumbers (seedlings)

• Edamame (seeds; plant in batches every two weeks through May)

• Hops (through May)

• Lemongrass, Melons (seeds; seedlings in May),

• Squash (seeds; seedlings in May)

• Tomatoes (seedlings; through May)

• Zucchini (seeds)

via Our planting calendar - Sunset.com.

Today I planted 3 kinds of tomato, chilies, and pepper seedlings plus seeds for watermelon, corn, edamame, zucchini, pumpkin, and sunflowers. Total cost (including the new shovel, $55.)