Does the Bible Authorize Blogging?

I solemnly charge you in the presence of God and of Christ Jesus, who is to judge the living and the dead, and by His appearing and His kingdom: preach the word; be ready in season and out of season reprove rebuke, exhort, with great patience and instruction. -2 TIM 4:1-2


Now these things, brethren, I have figuratively applied to myself and Apollos for your sakes, so that in us you may learn not to exceed what is written, so that no one of you will become arrogant in behalf of one against the other. - 1 COR 4:6


Based on these two verses, and the pattern of scripture, how do we justify blogging? 2 TIM 4:2 calls us to preach, the word not post it on the internet. Where is the New Testament authority for google reader, blogspot, html, comments, and facebook posts?
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