Soap bars are making a grand comeback. Go to any weekend markets these days and you'll find at least one, if not many, soap bar makers there. Sydney Rocks Markets has at least three, Brisbane Manly is the same, Kuranda Village has their fair share, too.
I just finished a dish wash bar. I actually liked it more than Sunlight/Fairy/whatchamacallit.
In addition to getting really nice staff as bars, I also like the fact you avoid the plastic containers. You get the bars in cardboard boxes or wrapped in paper for the trip home. Less waste on all sides. Another thing that's in favour is the longevity of a good bar - it took me 1.5 years to finish a hand wash bar. I'm one of those who've been raised to religously wash hands every time I come in from the outside (shoes off, hands clean, now you are welcome home...) so the soap got plenty of use. Now I'm frantically trying to finish a body wash bar but it just doesn't shrink however much I try.
Now, to link this back to the topic, however loosely: how to best keep a soap bar dry and good during travels? If you used one in the shower in the morning and then check out from your accommodation, how do you make the bar dry for travel so it won't soak and your soap container leak?