I got the same e-mail after I signed up..Said they were shipping it to me, been 2 weeks and I haven't gotten it yet..Can't find the link to where I printed mine from..Mine is beginning to look a little ragged and want to print another out, guess next best solution is to use the copier at work..
This differs based on city/region. When I started (spring '15, Madison) no trade dress was either provided or even mentioned. None was required to operate anywhere. Since then there was a change in TNC pickup rules at the local airport and window signage is required when operating for hire on airport property. But even this is loose, drivers are on their own for making whatever sign they deem fit as long as airport personnel can identify the sign. I simply printed and laminated a coaster sized Uber logo and pop that up in my windshield whenever I'm at the airport