Well, there\'s EQ\'s way, allowing lvl20+ to have surnames; I\'ve always rather fancied that; although that doesn\'t equate well to a skill-based system...
I don\'t think surnames should be used as part of a character\'s name, though; then we have many people running about quite possibly with the same first name, most confusing. And then take Jessyn\'s name for example, imagine having to type \"/tell K\'twill Tak\'talamesh\"...
For RP purposes, though, surnames would be great. Although I think I\'ll just go by \"Grakrim\" with no surname, as that fits in rather nicely with my backstory (Although I may be mistaken that its actually something I want to use; I was rather sleep-deprived when I wrote it).