OK, this is how it goes:
1. domainzero.com
PRO: FREE, YOU own it (registered to you), NO BANNER, CC# not needed.
CON: No longer exists! Does not hid true URL, no hosting, only domain.
2. namezero.com
PRO: FREE, Hides URL, CC# not needed.
CON: Takes 60 days to activate (at least), THEY own it (they can take it away once it gets popular), 1/3 PAGE BANNER, (AND!!! If you try to take away the banner they will CANCEL your account unless you pay them $25 to continue using the domain... They still own it... i've already lost 2 dotcoms that way.), no hosting, only domain.
1. namedemo.com
PRO: FREE
CON: Not sure who owns it, not sure about banners, and CC$ REQUIRED!!! (no deal)
3. $10-$15
PRO: YOU own it (registered to you), NO BANNER
CON: Cost, no hosting, only domain.
4. >$15
PRO: Better service, most have host and webspace, good tech support
CON: Cost $$$.
Sorry this is not more indepth... but my recomendation is to just pay the $10... unless it a relatively unimportant domain... u don't want to risk having namezero.com buy it.