I suggest going to five or so threads a day and posting, "Hi, I am new here, just checking in." That gets you your picture- and url-posting privileges and without urls it is really hard to make comments on specific bikes--or rather, it is hard to make meaningful comments on the same bikes you are actually looking at. I'd hate to go on and on about some great deal only to find later I talked someone into buying a different bike than the one I was talking about.