Here's a spreadsheet to help you grapple with the whole mess. (November 2009)
And another to help compare different mortgages directly.
It's in the Open Document format (and was updated with Open Office 3), so if you're using an old or proprietary tool, you may need to convert it first.
Non-commercial use is unrestricted. Feel free to look me up on IRC in #kernel-panic on irc.freenode.net. Have fun.
The old version of this page is available here .