there's a little Google Finance update... i might be wrong but chart-linking for instance is new

Yes you're right, more info here:
http://googlefinanceblog.blogspot.com/2007/09/updates-on-charts.html

since when do the corporate Google blogs have comments enabled?

Some Google blogs do have comments, but not many of them (I guess it depends if someone has the time to moderate them).

Google Finance is still restricted to US! I wish it could be available worldwide soon!