Extract date range;
awk '/22\/Aug\/2011:00:00:/, /28\/Aug\/2011:23:59:/' access.log
Merge with awstats;
sudo /usr/local/awstats/tools/logresolvemerge.pl /path/to/logs/*>/path/to/logs/all.log
Get activity by IP address from access logs;
tail -10000 access.log | awk '{print $1}' | sort | uniq -c | sort -n