if she asked you about a girl your talking to on myspace, i believe thats an IOI at this point, you could ask her about this guy but know that by doing that you're returning the IOI, be careful though of how you go about getting information it should be kinda casual, if it was me i would act like it didn't bother me and not ask anything about him quite yet, i would wait until after they've had their date, then search ways to disarm him even if i never came in contact with him, so basically pay attention to how she describes the date they had and try to find were he might have fucked up (it could be anything) and capitalize on that, be like "thats sketchy " or something to that effect, then he's disarmed and you continue gaming her like you normally would, this is just one possibility, hopefully this response wasn't to late

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Capture the imagination first and the heart next. - Style