It would be really great if it was possible to make file read only on unlock, as in StarTeam IHM.
This is the only missing feature for me and my team be able to use StarTeam seemlessly.
I must say that have been really disapointed because this was a requirement for the choice of IDEA as IDE for our project and I really thought it would have been possible. (this is why we purchased IDEA 3.0)
Being able to do a CheckOut&Lock, CheckIn&Unlock, comment CheckIn would also be great and just require 3 additional line in the contextual menu.