I did it with my first clutch last year and will do it again with anything that drops this year. My girl from last year appears to have about the same amount of eggs in her as she did last year but in a few more weeks I can let you know for sure.
Here is an interesting read on maternal incubation:
Bob Clarke Maternal Incubation Article
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Tosha 
"Nihil facimus sed id bene facimus"

6.42.0 Ball Python (Harry and Fluffy and gang)
1.0.0 Angolan Python (Anakin Skywalker)
0.0.1 Green Tree Python (Verdi)
0.1.0 Bredls Python (Smurfette)
0.2.0 Feline (Pippen and Pandora)
0.0.1 Desert Tortoise (Pope John Paul aka JP )
2.2.1 Fish (1,2,3,4)
0.0.0 frogs rescued from pool skimmer
0.0.1 Lizard of unknown origin