Nielsen Netratings reports MySpace gets 57 Million unique visitors each month. Ebizmba says MySpace gets 60 million uniques. Quantcast says the number is 47 million. I don’t know what Alexa thinks, but regardless, the number seems to be growing. 
Just for fun, here’s a glimpse at where the traffiic is going among social / Web 2.0 sites:
According to Nielsen Netratings: April 2007
Here are Nielsen’s numbers from 2005 and 2006 - note the changes…
Gainers: YouTube, MySpace, Facebook, Xanga, SixApart Typepad, Yahoo! Groups
Biggest slump: Blogger
Flat or down: MSN Spaces, AOL Hometown, Classmates.com
Here’s a Top 25 list of WEB 2.0 Sites (in reverse order for some reason) from ebizmba.
ebizmba also offers a list of top 10 social bookmarketing sites here
Here’s the Quantcast Top 25 list Note: Yahoo! gets approximately 115 unique users per month. Google gets approx 110 million…then there’s a drop to MSN at 66 million - just to put MySpace into perspective.
[...] Social sites and their audiences - Sports Marketing 2.0 | Pat Coyle Nielsen Netratings reports MySpace gets 57 Million unique visitors each month. Ebizmba says MySpace gets 60 million uniques. Quantcast says the number is 47 million. I don’t know what Alexa thinks, but regardless, the number seems to be growing. (tags: social-networking statistics) [...]
I don’t care for MSN Spaces; no, that’s an understatement. I don’t care for most of those sites, and I’m actively antagonistic to MSN Spaces.
However, when you describe 286% year-over-year gain (MSN Spaces) as “flat or down”, 80% growth (Blogger) as “Biggest slump” when AOL Hometown is showing 15% shrinkage, and you single out Xanga’s 27% gain as an example if “growth”, it makes me wonder if someone has hacked your website….
OK, Paul, let me straighten this out. First of all, and this is not an excuse :-), but I blog at 5am, so I’m allowed to be confused. And you’re correct in all the numbers you quoted, but those “deltas” are between 2005 and 2006. I got my “gainers” and “decliners” by comparing 2006 to 2007 numbers. (The top box is 2007, the lower one with the comparison percentages is 2005-06). I was an English major in college, so once again I reserve the right to be wrong, but it looks like Blogger is off 32% whle MSN spaces isn’t even showing up in the top 10 in 2007. I just assume that means it stayed flat or dipped below its ‘06 traffic. And I’ll admit, I don’t have any idea what Xanga’s growth was year-over-year, since I don’t see it on the 2007 list either. Hope this clears it up.