I was reencoding my flacs for use on my IFP flash player and found that oggs have problems so I was thinking of resampling to 32 kHz with foobar and then encoding with fhg using acmenc since fhg lowpasses at 16 kHz anyway. Would this degrade sound quality significantly?

Resampling to 32 KHz could help encodings to sound better, especially at low bitrate (for mp3 at least). I've tested it last hour, by comparing lame --preset 96 [32 KHz] and and --preset 96 --resample 44100: the 44.1 versions has on some occasions bad artefacts, whereas the 32 KHz offers cleaner sound and better encodings.

But 32 KHz has also known drawbacks: it will increase the level of pre-echo. There could be also more problems. I suspect 32Khz to have something boring or tiring. It's a bit strange... maybe placebo or simple consequence of lowpass.

Now I can't tell you if the Fhg acm encoder would also benefit from the resampling. You should make some comparison on your side. For example, just start with the default setting (no resampling) and as soon as you encounter a problem (distortion, artefact) try to see if the resampled encoding reduce or solve the problem. If the impact of 32 KHz appear as positive, keep it.
At high bitrate, I doubt that 32 KHz would help any encoder to sound better. The biggest change would certainly be a negative one (pre-echo).

Thanks guru. I believe I read somewhere on here that Fhg is tuned for 32kHz whereas Lame is not. So, I guess I'll try your suggestion. I was going to use 128 at 44.1 and 96 at 32 but I probably won't be able to tell the difference at this bitrate. We'll see...

I tried it and they sounded pretty good except that they're lowpassed at 12 kHz! That's a little too low even for my old ears.

I've found resampling to be effective at taking out most of the tinny "clanging" artifacts at lower bitrates..