If you want to check out their music they've got a few mp3s for download on their site. Click here
So, if you like it, they'll be here in May. I don't know how much the cover will be but from looking at past shows it's generally less than $10.
According to the generic mailing list email that I also got, they are also going to be in Austin, TX next weekend:
SAT 3/18 - Austin, TX - Nasty's - Party night at SXSW!
SUN 3/19 - Austin, TX - Vanilla Girl - acoustic show for the GoGirls Showcase at 3pm
The website lists a few more shows through the end of April in WI, IL, KY & MI. The details for the May show in Mpls aren't up yet though.