it looks good, but i think it should be a lot bigger, and more like a large energy blast than a puff of smoke (the shockwave, that is..the puff of smoke actually looks cool)
make it so big that people across the map go "yeah, they got it.."
and if its possible (which i doubt) it would be sweet if the blasts were color coded..the blast would match the base where it occured (Blue captures the red flag, returns to blue base, blast is blue, and vice versa)...cool stuff though..i like it..