My nomination is Geong (GNG) - here's the thread:
At 31.5p the m/cap is only £8.2m, but GNG are forecast to make 5.7p EPS for the year to 31/3/08. They're highly profitable already with an unbeatable blue chip client list and heavy H2 seasonality, and if the new SmartBox product takes off in China and elsewhere (it's already been heavily promoted) then the sky is the limit imo.