Liquid Pop Collective put this video out a few years ago; it is quite effective in breaking the style down into it's "learn-able" pieces. This video breaks down the popping techniques used in Liquid dancing.
Check the playlist for a full 7 minute routine from LiquidPopEric, a Digits tutorial, and other highlights from the video: www.youtube.com/view_play_list?p=CC8F51A 66444D195
Again, if anyone knows where to buy the original let me know. The tape is long lost, and I'd like to re-rip.