The site that Olepigeon pointed me at lead me to one called OSXLatitude which is especially for folks putting OSX on their Dell Latitudes and the D430 seems to be an especially favored model. Thank you Olepigeon!
I haven't read through all of it, but assuming it's still around when I'm ready, I think everything I need is available at that site.
I really like the D430. It's a couple of generations back now, but it still has a Core2Duo even if it does only run at 1.33 GHz. The shape and feel is just really nice.
I picked up an E4300, the next corresponding model, with a 2.4GHz C2D. But I still like the D430 better. It's just nicer feeling ergonomically.
On the tech side, the D430 uses a PATA/ZIF 1.8" drive and has no built-in optical drive. The E4300 is slightly larger (fraction of an inch) in every dimension, a little heavier, and has the optical drive built-in. The E4300 also uses a standard SATA 2.5" hard drive, so it's much easier and cheaper to expand that, but I still like the D430 better.
Both models are coming off of leases and such right now and are widely available on Ebay.
Oh, so the thing that caused me to buy a Dell laptop? I wanted to get rid of the giant tower PC which was running my chip programmer and replace it with a laptop, and I wanted a fairly recent laptop. But I needed a parallel port. Both of these Dell models have docking stations with parallel ports on the dock.
So with a docked Dell laptop, I have a compact machine I can use to drive my Chip programmer (parallel port) or a modern FPGA development system (USB port) or a microcontroller development system.
The D430 works great with the chip programmer. I haven't tried the E4300 yet, because the docking station for the E is still too expensive.