Here is my list, oddly enough, it seems more are from Turkey. I have not checked, but I imagine there are some repeats.

67.180.242.3
222.244.132.155
88.233.20.64
88.214.201.231
88.249.98.46
68.217.129.240
61.51.191.202
212.113.58.159
65.80.11.202
193.82.139.98
203.115.140.68
85.108.145.65
91.122.38.97
88.247.106.157
222.247.176.64
72.147.4.234
221.225.63.96
85.100.196.117
88.234.126.152
203.87.179.234
88.214.199.18
85.210.142.82
85.108.242.226
24.217.104.212
85.98.46.4
88.244.229.204
75.82.236.139
82.207.52.208
88.244.233.62
91.124.72.82
82.207.63.51
195.69.171.118
196.20.7.74
132.60.240.80
198.54.202.82
218.81.151.73
85.107.193.194
88.242.205.114
78.172.87.209
219.139.128.67
89.109.62.73
91.122.190.131
84.134.127.235

Here is my list. Everyone has the first one (67.180.242.3) because Ray ships BlogCFC with that IP blocked. Ask him why...

67.180.242.3
203.115.140.72
216.40.222.82
218.81.142.85
221.6.155.165
60.190.240.76
60.190.240.76
218.81.155.112
88.214.193.87
88.214.201.242
88.214.203.202

Consider checking out http://www.projecthoneypot.org/ You can have instant access to 22,479,130 IP addresses as well as the reasons that they are blocked. I have my own personal list, but it is too long to list here.

Also, most of these IPs are proxies on computers that have been exploited. It's very difficult to determine who manages the actual computer and getting in touch with anyone is almost impossible. I initially wasted my time trying to contact admins and now simply block POSTs from any identified IP addresses.

"I'm considering blocking the entire class A IP block for China"

China, population: at least 1.3 billion, with internet usage rivalling or exceeding the USA, depending where you read
http://www.forbes.com/2006/03/31/china-internet-us...
http://www.digitaljournal.com/article/253753

do you really want to block that much potential readers of your blog? It's a very big sledgehammer to crack a nut

You might want to give the SpamStop plug-in for blogCFC a try. I wrote that a while ago and works just fine ( makes use of project honeypot). Check http://www.schildmos.nl

the sharing of the blocked ip addresses is a great idea. i once thought about throwing up a page where people could just add to a list (and wondered if blogCFC could be modded to pull from there as a web service).

i haven't been using blogcfc for long, so the only 2 i have (not including the "everybody gets 67.180.242.3" address) are:

121.24.171.92
85.254.186.161

here's the list from my old blog on cfblog.com:

195.234.202.45
194.187.148.40
62.192.182.162
88.214.203.202
193.239.206.202
89.122.249.77
91.187.5.86
89.41.215.103
91.187.7.113
91.187.0.20
91.187.7.57
91.187.0.53
91.187.2.214
212.59.22.101
193.138.177.228
81.222.249.158
86.57.159.190
91.187.8.6
91.187.5.211
88.214.197.227
24.88.98.89
81.182.181.80
81.25.39.226
81.25.37.237
121.24.171.161
121.24.171.92
124.24.171.*

...and now that i've actually read the previous comments, looks like that concept of a shared spammer ip list has already been put in place via honeypot and jax's spamstop plugin.

i'll likely be looking into integrating the plugin over the next couple of days.

I have goten some interesting spam. The best one by far was a code example, not relevant to the post at hand, where they tried to demonstarte parsing URLs or some such, and had URLs to teh syupid sites. I kept the comment, blocked teh IP and changed all teh URLs to http://www.google.com.

These are the most recent comment spammers (all over the map, thailand, japan, etc)
Current IP addresses being blocked
125.212.41.130   
80.162.9.84   
58.183.38.249   
68.205.212.254   
212.143.230.112

91.187.0.20
91.187.7.57
91.187.0.53
91.187.2.214
212.59.22.101
193.138.177.228

Here goes the mine, but it's huuuuge (link above ^)