I'm sorry for taking a whole day to respond to this one:
To use an anchor, you end up linking to the anchor with #anchorname.
So, for example, using that code above, if you dropped an achor with [anchor=foo]
You would then move to that location with an url tag like this
[url=#foo]Go To Foo[/url]
Which would render like this:
Go To Foo (granted this link won't do anything here on this thread, since there isn't an anchor here called "foo")
--
It's all in the reflexes.