Re: govorun, alper:
Maybe the comment was burried because it's not accurate.
I am using fruux since public beta v0.6 on a system with russian primary language and never had any problems. fruux is very popular in russia, check:
http://www.deepapple.com/news/32040.html
And the fruux support is really blazing fast - they reply even when they should be asleep in their timezone!

Re:govorun You should do some further research before condemning a comment because it's not in English. A Google translation, although rough, shows it's of interest to Russian users:
"Contacts with the Russians is not working. Demolishes the address book, bookmarks and calendars. Neither version is not accepted zasinhronizirovat two companies, the first all OK6 a mistake at the second reading."

The best freeware application i've used for a long time. Pure MacOS style, simple and DO what it's says. That's why i've helped the team with a translation.
Must test it ;-)

I'm not entirely sure how their system works, but it does involve cloud-computing so yes, your stuff is somehow stored on some server somewhere.
I've had a great experience with this app. It is so easy to setup: download...one click install...sign up for a free account within the pref pane...check always keep syncronized...repeat for all your computers...enjoy syncronization

С русскими контактами не работает. Сносит адресную книгу, закладки и все календари. Ни одна версия не согласилась засинхронизировать два компа, На первом все ОК6 а на втором ошибка чтения.

Does anyone know if they store your stuff on their servers like MobileMe does or do they only sync between macs that are turned on? How does the versioning work? Is it usable, automatized?