I'd stay 5 days in each village if I were you. Both establishments are very good, BTW.
The LANE ferries travel between Piraeus, Milos, Santorini and Crete twice a week and back on Fridays and Mondays. The departure times don't vary too much from year to year-this is a year-round schedule. Last year, for example, the departure times were:
from Piraeus: 6:40PM (5 hours to Milos)
from Milos: 12:10 after midnight (4 hours to Santorini)
You may be able to find the LANE ferries' schedules posted on http://www.openseas.gr/OPENSEAS/index_en.vm, but not until one month before departure, and don't expect to be able to book online. You may have to purchase your tickets through an agent, or at a kiosk at the port the evening of your departure. As a consolation, there are always seats available on the LANE ferries, even in August.
There is also the Romilda, which makes the Milos-Santorini trip 1-2 times/week, usually on Tuesday nights.
As for accommodations, here is the website with *all* licensed hotels in Milos, representing all hotel-members of the Hoteliers Association of Milos:
This website also has links to book ferry tickets online and to Olympic Airways' website. It does NOT list rooms-for-rent establishments, just the licensed hotels.
Thanks so much for your help Andreas. I will come back to you soon with another question : )
Milos is not as big as it looks because all the settlements are located in the eastern half of the island which means that it just doesn't make sense to split your time between two locations. Adamas is nothing special and I would always choose to stay in Pollonia which is in a lovely location with a nice beach shaded by tamarisks and has some good tavernas.
I believe Milos is as big as it looks–about 150 square km.
Philhellene is correct that the largest villages in Milos are located relatively close to each other. All except for Pollonia, of course, which are located 10 km. away, on the NE tip of the island.
However, proximity of the various villages with each other should not be the determining factor as to whether to split your time between 2 or more locations. Location itself is, plus the individual characteristics of each destination, and why not, the specific accommodations, as well. All of the above will be evaluated against the individual's personal preferences, of course.
In a recent Milos forum thread someone advised someone else not to bother with Pollonia at all and definitely stay in Adamas instead. Opinions are just like orifices. Everyone has one.
I am now more or less decided to find a bungalow (4 people) to rent. I have already written to Nikki Savas and captain Stavros. But do you know Han and Ursula Theill : they rent a house ("Amalia") in Pollonia : does someone know these people ? Two other questions : a) are there different pplaces to stay in POllonia or are they "equal". b) I have seen beautiful pictures of a beach with the rocks : is that Pollonia ?
There are a lot of places to stay in Pollonia, and yes, there are differences. I am not sure which pic you have seen of Pollonia. The "Pelekouda" peninsula on the tip of Pollonia is rocky, but the main beach of this fishing village is pure sand. I will be posting a few photos of Pollonia on this forum thread soon for you to download.