[MIIGHT]

I just recently purchased a blackberry curve 8300 and did not sign up for a data plan because i have access to wifi 90% of time. My question is, is the phone completely useless without data i notice i cant even use MSN on wifi.
Before i bought my BB my friend told me that i could still use everything on wifi, just not BBmessenger and BB email, But it seems i cant use any applications on wifi.