As for Heidi, Amelle and Jade … Doesn't look like they will be getting back as Sugababes any time soon. Although, I think they should! Jade and Heidi had successful runs last year in musical theatre and Jade will continue this year in Godspell. Amelle apparently recorded two albums. But after her solo single last year "Summertime" didn't set the charts on fire, who knows if she will release more solo tunes. My advice: Get back to Sugababes and go indie!
And don't forget, there is a teen tribute group to Ace Of Base called A*Base. They should have more remakes of Ace Of Base songs this year.