I don`t think there is going to be any new episodes.But a second Sex & The City Movie is possible.There are some rumors.
Anyway,if you like these shows you should check out another HBO show called Oz.It was the first one-hour drama ever produced by HBO and ended its run on 2003,so it`s not as popular as some other HBO shows.But it`s REALLY good.Everybody on the show gives very believable performance and some are truly outstanding.It helped me discover some amazing talented actors,like B.D.Wong(who is openly gay),Lee Tergesen,J.K. Simmons,Christopher Meloni,Eamonn Walker....The list goes on and on.
It also contains one of the most interesting gay relationship storylines ever which begins towards the end of Season 2.There are also A LOT of male nudity during the whole series.Some of the guys are HUGE,if you know what I mean.
careful,may contain spoilershttp://www.imdb.com/title/tt0118421/