If you can get hold of a prototyping shield, you can solder up a bunch of 3-row
headers yourself. Will only take about half an hour. I have used a couple of these
shields on projects, sold locally at Radio Shack, but Seeed Studio is a chinese
company, I believe,http://www.radioshack.com/product/index.jsp?productId=13297702
BTW, I am testing one of my boards, and FYI, I have a 33K series-R in one of the
I/O lines going to a servo [normally used as part of a voltage divider on Vin], and
the servo moves just fine. In general, though, I would use much lower values,
largely for noise considerations, eg, 220-330 ohms.