Urgent Question on Alternatives of Guest Posting?

[Jake]

He did not say it was "Forbidden, jut that it has become yet another SEO spamming technique, degrading the quality of a typical guest posts. An in body link still remains more valuable than alternatives like blog comments.
Google may be bothered that this form of SEO spamming is more difficult to identify (when people don't stupidly send him paid post requests)

Just a reminder, Google considers any link "created for the purposes of search rank manipulation to be SEO spam"

http://www.mattcutts.com/blog/guest-blogging/

He further says: "There are still many good reasons to do some guest blogging (exposure, branding, increased reach, community, etc.). Those reasons existed way before Google and they’ll continue into the future. And there are absolutely some fantastic, high-quality guest bloggers out there"