All these stats ignore class projects which are currently banned from creating batch experiments.

Recent activity:
{{{
mysql>
select year(last_activity) as yr, month(last_activity) as mo,
       p.pid, eid
  from experiment_stats s, projects p
 where s.pid_idx = p.pid_idx and
       !p.class and batch and year(last_activity) >= 2009
 order by yr, mo, p.pid, eid;
+------+------+--------------+---------------+
| yr   | mo   | pid          | eid           |
+------+------+--------------+---------------+
| 2009 |    4 | T1T2         | jdemo         | 
| 2009 |    5 | SecureIED    | 32hostsmcast  | 
| 2010 |    1 | liveobjects2 | myexp1        | 
| 2010 |    3 | DeterTest    | jjh-batch     | 
| 2010 |    3 | DeterTest    | jjh-batchtest | 
| 2010 |    3 | liveobjects2 | myexp         | 
| 2010 |    3 | Panorama     | bitfuzz10-1   | 
| 2010 |    8 | SOS          | appcomm       | 
+------+------+--------------+---------------+
}}}

All batch, by project:
{{{
mysql> 
select p.pid, count(*)
  from experiment_stats e, projects p
 where e.pid_idx = p.pid_idx and
       !p.class and e.batch
 group by pid order by count(*) desc;
+--------------+----------+
| pid          | count(*) |
+--------------+----------+
| ddos         |     2412 | 
| Fidran       |      134 | 
| FloodWatch   |       48 | 
| MONA         |       29 | 
| worm         |       12 | 
| emulab-ops   |       12 | 
| NSUDDOS      |       11 | 
| DeterTest    |       10 | 
| psuworm      |        8 | 
| SOS          |        6 | 
| rsgc         |        4 | 
| DIAMOND      |        3 | 
| Deter        |        2 | 
| liveobjects2 |        2 | 
| SWOON        |        2 | 
| vinci        |        1 | 
| T1T2         |        1 | 
| SecureIED    |        1 | 
| DDoSImpact   |        1 | 
| Panorama     |        1 | 
| eWorm        |        1 | 
+--------------+----------+
}}}

All activity, ever:
{{{
mysql>
select year(last_activity) as yr, month(last_activity) as mo,
       count(*)
  from experiment_stats s, projects p
 where s.pid_idx = p.pid_idx and
       !p.class and batch
 group by yr, mo
 order by yr, mo;
}}}