Finding an iCal calendar and renaming it is probably in the realm of the Finder - I guess you have those parts done in your Automator action already? The only missing part is to write an AppleScript that invokes Yummy FTP to upload your file to the server and location of your choice. This is how you do it:
1. Add a final Automator Action - Run AppleScript
2. Paste the following script:
on run {input, parameters}
tell application "Yummy FTP"
UploadURL "
ftp://username:password@servername/fullpathtodestination/" with input
end tell
return input
end run
3. Since you'll need to include a full URL to your upload destination, replace the relevant parts in the example shown. If the password is stored in the Keychain then this (and its preceding colon) can be omitted.