[typo] Permalink Structure

[facedown@mac.com]

I've setup a test install of Typo, imported everything from WP, and  
have it ready to go except for one thing. On my WP blog, I'm using  
the following permalink structure:

domain.tld/post_id/post_name/

I don't want to break incoming links and need to find a way to keep  
old links working in order to go live with the Typo install. I've  
found config/routes.rb and assume I might be able to set something in  
there to route visitors correctly, but don't know how to go about it.

I really don't care about the final structure. IOW, if it's easier to  
keep the Typo install using the articles/year/mo/day/post_name/  
structure while redirecting those who come in on the old links,  
that's okay. I'm not too concerned about links to category or date  
archives—only links to individual articles.

I appreciate any help you can offer. I've spent much of this  
afternoon searching the Typo site, reading through the list archives,  
and searching Google, but don't know that I've hit on the right  
keywords, yet. If this has been written about elsewhere, I would  
appreciate the link.

Thanks,
Kevin