What, if anything, is safe to symlink in /var?-Collection of common programming errors

We have plenty of space on a different mounted device. Since the /var partition stays relatively static in terms of size (around 8-10GB because of big logs that we need), I’d be fairly happy to simply make our current /var space 65% full rather than 75%. In other words, we don’t need to move much. Here’s a snapshot of what’s in there now:

4.0K    ./account
119M    ./cache
0       ./clamd
292M    ./cpanel
8.0K    ./crash
12M     ./csectsh
528M    ./data
16K     ./db
16K     ./empty
6.1G    ./lib
4.0K    ./local
24K     ./lock
1003M   ./log
16K     ./lost+found 
0       ./mail 
120K    ./named
4.0K    ./nis
4.0K    ./opt
8.0K    ./portsentry
20M     ./pravda
4.0K    ./preserve
84K     ./profiles
236K    ./run
115M    ./spool
470M    ./tmp
4.0K    ./yp

We just repartitioned a bunch of stuff on our production server, so I don’t really feel like scheduling more downtime, especially since I believe we have an SLA with a client. I know that many of these files’ parent processes would have a problem with sym links, but I’m far from an expert, as this is an inherited system. Does anybody know any sure bets for things that can move?