VERY interesting...
This could easily go the way of great success or horrible failure, but I think overall it improves Sony's online presence.
Buying a 3rd party solution is a quick and dirty way to add a whole lot of features fast, the biggest stumbling block is leveraging that system to work for your specific needs. Basically they need to make sure it integrates seamlessly with the console as opposed to some tacked on port of PC software... you need to be able to navigate through the menu's easily with a controller (where the PC version you'd use a mouse), make sure it works with the entitlement system, make sure it can handle more then one account at a time (remember PCs are only ever built for one player per machine), making sure the menus and other text are easy to read at SD as well as HD resolutions and 4:3 as well as 16:9 aspect ratios...
There are lots and lots and lots of little details that need to be worked out. As someone who work on integrating 3rd party software on a daily basis I can tell you that upper management LOVES this type of stuff because they can make one clean purchase and +10 to their feature list... they often don't realize that these solutions can still take a lot of massaging to make seamless and flow well with what's existing already.
As I said, this could make for a great success or a horrible failure. Here's hoping Sony is (and has been) giving this partnership the attention required to make it work in their favor. At very least I give kudos for them finally realizing that they can't make software to save their lives.
The article seems to be mostly speculatory based on XFire's existing PC service (which is fine) but it still leaves question as to how it will handle things like leaderboards, entitlements, True Ranking, Gamerscore, reputation, and player feedback. All things that Xfire currently doesn't handle, but Sony has claimed to be handling with their upcoming service to combat Xbox Live.
I'm also curious to know how XFire benefits in this... where are they getting their $$? They said that they don't charge for features that are normally free on a PC but get their profits from their "content" but exactly what are they delivering for content?