In the past I used Weebly (years ago Squidoo) to test some markets/keywords.
You could get relatively easy on first page for long tail keywords and if the site converted I gave it a go and purchased a domain.
But now, after Panda?
Weebly or Blogger or ??
What's your pick to get a fast ranking for a test.
Or should I make a PDF and put it at Scribd?