I posted a reply to this yesterday, but I guess it didn't take because of the 'problems' DH was experiencing.
Thank you everyone for your responses, especially for the Sitepoint article link. I plan on playing with it.
I know there are very few guarantees about design and you don't always get what you want. However, configuring browsers is something that the majority of 'average' site visitors don't do, so launching a new browser window is typically safe for the sites I do (not a strong Slashdot contingent).
I generally don't like pop-ups, but I feel that 'resources' (ex: a citation in the middle of an article) on a website fall into a special exemption. It's not like I've got entrance or exit consoles that are hijacking page views to someplace they never agreed... I'm just trying to keep eyes on my site so while they go explore they don't forget what they were doing in the first place.