php blog site for 123php.com

Hi, Can anyone recomend a good blog software that does the following: 1. Have differient articles on the first page and show the first x ( or 10) words then a link to the rest eg Php make leaps and bounds in the field of ... click here to read article 2. Users have to register to post replies/comments (or if possible to read the whole article) 3. makes search engine friendly urls eg 123php.com/blog/article777 I have checked hotscripts: http://www.hotscripts.com/cgi-bin/search.cgi?bool=AND&query=blog&catid=2 and these ones seems a bit good, http://dev2.bblog.com/item/19/ http://www.acervus.ca/ Any URLs/ideas/suggestions etc are most welcome. Thanks, -Ryan