Several points:
Paul said this to the Colossians.
5: For though I be absent in the flesh, yet am I with you in the spirit, joying and beholding your order, and the stedfastness of your faith in Christ.
Col. 2:5
Though he was not there in flesh he had a strong presence with them.
Some said this about Paul.
10: For his letters, say they, are weighty and powerful; but his bodily presence is weak, and his speech contemptible.
2 Cor. 10:10
For some Pauls letters held more power than seeing him in person.
Sure its best to be face to face. But awesome ministry can come by way of the Internet also. Like Prax said, use whats available.