For any still wondering about "how many flash writes will kill a compact flash", take a look at this:
(It's a sandisk 512 mb compact flash.)
It's like this because the hdd that it replaced it's gone .. dead, and all logging on hdd remained on, from the backup copy, after restore to compact flash.
( oh, and not to forget, it's up and running, at this time, and now sends everything to syslog. )