Soldato
"'It's very real,' one source tells us. 'They (Sony) are dead serious about it. They've declared, and I quote, a 'full-on assault' on the latest version of Xbox Live.'"
http://www.joystiq.com/2006/01/31/sony-declares-full-on-assault-on-xbox-live/
Personally, I think its 90% marketing, 10% actual delivery. No offence to Sony, but they aren't a software developer. Microsoft's internal development tools are first rate (and exclusive to them, although they do use Visual Studio which is available to all). If Live took them as long as it did with limitless funding, true project management and a MASSIVE usability department - I don't see Sony making something to even half match Live by the time the PS3 launches.
It may support the same features per se, but it won't be half as usable and certainly shouldn't be as reliable.