MeteoConsult, a Dutch company, provides METAR and TAF via SMS. I just checked and the TAF works allright but the METAR gives me something else.
Details here (in Dutch):
Weer: Het Weer via SMS
Short version: Simply text METAR <ICAO> or TAF <ICAO> to 5454 and you'll receive the info in a few seconds.
I don't know if this works with foreign (non-Dutch) subscriptions though.
(Edit: Just filled in the form on their contact page to alert them to the fact that METAR doesn't work properly.)