A few events that I'm thinking of doing in the next few weeks.
Next weekend, there's the fulontri duathlon (5km/20km/5km) .
Then, Cambridge Triathlon club have organised a three race 5km series starting in the middle of May. Its being held across the road from work, so I've hardly any excuses not to do it :)
I've got the London 10k at the end of May as well to keep me occupied as well.