If you haven't yet read Cindy Dees' Medusa Project (Silhouette Bombshell from early 2005) I highly recommend it -- team of six women training to be a Delta Force type squad. It is 2% romance, 98% action (training and "real world" ops).
The follow-on Medusa Rising (Bombshell Sept 2005) is also good though I like the first book a bit better.