Is there someone left who uses them to reject mails on smtp level?
Yes, we are still using Spamhaus.org on our MX servers, but we are using the rsync feed and we are able to whitelist IPs within a few seconds.
Anyway: http://www.spamhaus.org/sbl/sbl.lasso?query=SBL55483 is still there but the SBL entry itself has vanished:
$ grep 192.174.68.0 sbl #192.174.68.0/32 $055483
(-> http://www.spamhaus.org/organization/statement.lasso?ref=7)
any opinions on the game [1] that spamhaus.org is playing?
Blocking nic.at was not nice but refusing to delete domains just used for phising is also not very clever...
Regards, Adrian