What I do is have a swag of edited effects on an old 100meg zip (min is an EX) so I prefer 250 meg Zip use for audio. I connect a KAOSS pad from the AUX outs too the Kaoss Padd and from the Kaoss Pad too the Aux Inputs. Set the SP808 too Send and Return on line input . Then I route the stereo AUX outs of my Mackie into the 808EX and connect the 808 too a Stereo line in Channel. I usually keep a Mini-disk / CD recorder or My RS7000 handy. It is quite easy this way to call up effect's with extensive use of the Step Modulator and the Kaoss Pad for my other synths too create loops etc etc for use later in a track.
Many of the 808's effects respond too incoming midi data and the Six Knobs (ie 3 controllers banks A+B) all handle midi CC's. So I can step sequence very long CC's passages at any note resolution on my RS7000 (down too 128th note steps for both Note and CC data).
This means I can all sorts of weird modulations happening from just using the 808 effects under midi control. The Ringmods can have motion sequnced pitch and melodic sequencers chucked at them. The pitch shifting effects actually track midi note data as well.
I have some custom 808 Ringmod patches where the input signal from Pad or Line is ring modulated against a detuned PWM waveform this intern is crossmoded with a TRI wavwform. The step sequnce (ie 808's step mod) is set too a gate time of LINK , portamento is turned on and S&H LFO locked at 1/8 note triplets modulates the filter with a heavy filter attack , positive envelope with lots of release.The step mode runs in parrallel modulating PW and Crossmodulation of the Two waves.
The delay is set to dotted crotched tempo sync with Delay send , Feed Back , Cut-off Resonance ,Filter Attack and Amp release or controlled via RS7000 step sequencing. I usually use a BPFilter set at 12db per octave slope. This can be mixed with the Kaoss Pad decimator effect and I'll feed my ER-1 through it. Sample it into my RS7000 doing a slice+seq job and then make re-cycled beats in a IDM styling with it.
This is just one example of what can be done.
Try vocoding drum loops against industrial grind core noises anything goes really. I find it quite invaluable. Also on the edit /step record event windo in the 808 you can easily cut out 1/4 note intervals assign them too pads ,copy them and then slice 8th's or 16th's out of them and reasemble in the step edit event screen. Etc etc etc.... I've had my 808 for a long time and work with it more than anything else. the Vsynth is a corker and very versatile when experimented with , good noise/effects generator, get some huge sub basses out of it and nice snarly D'nB bass line when feed through the KAOSS pad too. Nice 70's prog rock arps etc etc etc..... Most of the effects need heaps of tweeaking and a reassignment of controller knobs and step mod data too be of real intrigue. But I guarantee you it's all there at your finger tips .You've just got too roll up your sleeves and get your hands dirty. If you want I could give you my e.mail addy and you could send me say a bog standard 2 bar loop and I could do some manipulations (as audio examples for you) Just send me a .WAV file and I'll show you what can be done ....
Let me know if your interested and I'll send you my e.mail details.