I was just wondering if there was a way to send a MMS or SMS to multiple peope on a 8320?

compose sms > choose contact > menu > add receipient

Sure there is! While composing an SMS, click the "BlackBerry button" and select "Add Recipient".

^^Ditto^^

As mentioned elsewhere in this forum, create a group. While composing an SMS, before selecting recipient, hit Blackerry button -> New Group.

If it's more than 10 ppl, the best way is to make a group. Otherwise, you can only send to 10 at a time. Not sure if thats with all carriers but it's that way with Sprint.