Yes, heh... actually one of my sons buddies were talking about how to do that the other day. I think from gamercard.xbox.com or live.xbox.com You would need to set up a cronjob or similar to run a a script for fetching and update a database from which you pull the data. Or something like it anyhoo...
The best way would be to get a MSN developer API key Unfortuately they dont seem to be giving any away so your best bet is to cron + scrape like wing said!