its intentional

rasz@capek:/media/hdc3/home/rasz/source/trunk1/src/game$ cat tremulous.h | grep BOOS
#define BOOSTER_BP 12
#define BOOSTER_BT 15000
#define BOOSTER_HEALTH ABHM(150)
#define BOOSTER_REGEN 8
#define BOOSTER_SPLASHDAMAGE 50
#define BOOSTER_SPLASHRADIUS 50
#define BOOSTER_CREEPSIZE 120
#define BOOSTER_INTERVAL 30000 //time in msec between uses (per player)
#define BOOSTER_REGEN_MOD 2.0f
#define BOOST_TIME 30000
I can submit a lame patch changing
#define BOOSTER_INTERVAL 30000 //time in msec between uses (per player)
to
#define BOOSTER_INTERVAL 1 //time in msec between uses (per player)
but I doubt it will go thru