I'll have every baptist, in the house after me on this one, but I have to obey the Lord.
When you are saved, you are given the holy spirit. Now the baptism of the holy spirit, is a deep place with God. The holy ghost will not dwell in an unclean temple. When you get saved, sanctified, then seek the holy ghost. It's a gift from God. Alot of people talk against speaking in tongues. BUT it is real! Paul said, I'm glad I talk in tongues more than you all. The day of pentecost was prophecied by the prophet Joel, and for the last days when God would pour out his spirit upon all flesh.
Through tongues are messages given out over the church. Interpreted. The gift of interpretation of tongues. Last chapter of mark says These signs shall follow them that believe, they shall speak with other tongues....etc.
Jesus spoke in tongues. All we have to do is open up, and not quench the spirit, and let God channel through you. I'll be doing a complete write up on my website on this later.