For SMALL dinghy/tender sized sailboats, try here...
That sounds like fun, and I have run across a few other interesting sites. If you are looking to incorporate help from younger family members, grandchildren, etc. check out PDRacer.com -- for the cheap and easy way to get sailing quick on your own build.
If you are looking for a piece of beauty, look at clcboats.com -- they have kits, plans, build-to-orders (I think) and their boats look sharp. There are other small dingy sailboat planers and kit manufacturers thatlook nice as well, and I seem to recall at least one doing hands-on classes where they walk you through in a weekend class. Somewhere in New England area; some Googling should locate it for you if interested.
Best wishes on your endeavour!