I like to throw my support behind this as well.

I am currently using ICSync on my Android phone but unfortunately it screws up my ICS file everytime it uploads a change to my server. This of course requires me to log in to my server and remove the corrupted calendar. Rainlendar has never had this problem since I bought it a year or so ago.

I am also willing to pay another 10 euros for an Android version because Rainlendar is the ONLY calendar will connect to my ftp server and offers a working version for all my operating systems (Windows and Linux).

Yes an Android app would be awesome!