So looks like you now have the ability to delete your own posts... When you view a topic you have posted in, you can now see an "x" next to "Edit" and "Quote" on the posts you have made.
Alternatively, if you click to edit your post, there is a click box under "Subscribe Me" that allows you to delete the post you are editing...
However, might just be because I am an advertiser and I don't spend enough time looking at my posts to notice... Someone correct me if I am wrong and it is only because I am an Advertiser/Mod...