ITA with Friday13th.....I could see using them for travel (we do a lot of car travel and staying overnight with people where it wouldn't be convenient to wash diapers, or desirable to pack the dirty ones with us). Generally, we end up using disposable on the road. I could see giving these a try in those situations. Also when visiting my ILs, since my MIL is a bit weird about us washing diapers in her machine. I'd want to do more research on them though...do they really use the absorbent gels? That seems like it would be a no-brainer for a ecologically concerned company to stay away from...
As far as disposal....Obviously if I were to use them for traveling, I would either toss or flush. But I would be totally cool with the composting option if I used them at home. I just can't see them as an every-day all the time option--too much waste, too much work, not nearly as comfortable as cloth, and quite expensive. I like the idea for travel though. Seems a much better option than typical disposables.
Of course, all that would be dependant on functionality, though--the last thing I want to deal with while traveling is leaks or blow-outs! I think the starter kit would be a neat thing to put on a baby registry--or a neat gift for someone who's pregnant but not considering cloth. Sort of a soft introduction to a cloth diapering lifestyle, KWIM?