Welcome, thefabfive.
Your right, both names are served well by the extension.
While the names are good enough to sell to an enduser, as is (if you can find them), The key to .TV, at least in the forseeable future, is development. Do not expect revenue from traffic domaining, or an embrace from traffic domainers. .TV is an investment in the future. A future that you, and other .TV'rs must make by knowing the way of the winds and having your sail ext.tended when it shifts.
For quicky dev on the xxx -consider a link portal to free (clean link) porn videos. This will get attention in the market (and may attract a buyer) and may make you a few ad bucks along the away.
For castingcall.tv ... consider dev along the lines of a global video talent directory where folks pay for inclusion (screens out the uncommitted and helps attract talent scouts -who like the public can view for free). The vids can be uploaded, by the talent, to a (membership) blog entry that the talent can update with gig info. et al. Organize sub-catagories... by city and specialty... stage, film, tv, screenwriters, muscians, etc.. Push the content via Craigslist(s) and every other place you can... and hope someone gets "discovered".