Due to potential confusion and abuse the request for editing posts has been shot down several times in the past. You can click here to read what Lee Koo, our forum administrator, had to say about it. Even if it was approved it would take some time to implement...the feature's not just turned off, it doesn't exist yet.

The same would go for deleting a post, particularly considering that if you delete the first post in a thread all replies are automatically deleted too.

For the time being you have two options:
1.) Use the Preview option to take the time and review your post for content, spelling, etc. This is always advisable.
2.) If you realize you posted an incorrect link, replied to the wrong post, etc, you can submit a mod alert on your own post and ask that it be deleted. The need for that should be kept to a minimum, though.

Regards,
John