Lex Jenkins , May 11, 2005; 06:25 a.m.
The easiest way I've found to get fill flash with the SB-800 (on my D2H) is to set the flash to full TTL mode (I also use BL - balanced fill flash; and FP - focal plane mode).
I set the camera to "P" with metering set to full matrix metering.
On the SB-800 I'll dial back -EV 1 or -EV 2 depending on the circumstances, distance, whether I'm using a diffuser, etc.
If there's nothing to bounce off of (ceilings too high or none at all) I'll use the supplied diffusion dome at a slight angle.
This covers about 90% of my flash needs. While a flip frame would be best for verticals Stroboframe and at least one other company offer very lightweight, simply flash frames that get the flash into the proper orientation overhead for use when the camera is vertically oriented for "portrait" mode.
TTL flash with the D70 and SB-800 it should cost you nothing more than a couple of evenings' practice to get the hang of things.