"repeat last action" the one being used everyday in Maya.

"G" key, right?
For example, select few vertices, merge them, select another group, hit "G", and so on. Also you could record few actions and make it on the shelf, and then just one click the job is done. This is also similar to photoshop action record.

Repeat last action is one of my favorite short cut.

I like it. would not be THAT hard to impliment?

Great idea, just don't put it under G