I use gMail and just received an email asking for information regarding account currency.
This is a major scam. Although this is being reported, immediate Google searches aren't turning up anything.
The emails are sent from email@example.com and is cc'ing a "Gmail Team" address at firstname.lastname@example.org.
Do NOT be fooled - this is most definitely a scam.
Gmail Scam Warning Code:VX2G99AAJ