Christine's done quite well - she gets a fair bit of segment work on shows like This Morning, etc, and seems to get a fair bit of public friendliness too, these days.
Agree that Nell has done well - much more work, and a better profile.
Think Rhona has been very successful - Russian Roulette isn't really my cup of tea, but it's clear that she's got her eye on the mainstream, so it was a good move. Having an on/off romance with another reality TV person has also helped.
Tara gets a lot of magazine covers etc, these days, and dosen't she have a presenting job with Tony Blackburn soon? Considering her public image when she started being an It Girl, it's a remarkable turn around for her.