As far as a studio album goes, not yet.
One of D12's members, Bizarre, has released three studio albums since D12 World.
D12 themselves have released two mixtapes (The Limited Edition mixtape, and Return of the Dozen Vol.1).
They are currently touring but have recorded material for a third studio album.
Up-to-date information regarding this album and their activities can be accessed on d12world.com (as far as I know, the information on said site is fairly reliable).
The album was the first album released by the Notorious B.I.G. It was put out in 1994, and was his only studio album since he was killed before the release of his second album.
They were active since 1986. Their first album was brought out in 1987.
Eminems wife has since the second divorce been keeping a low profile!
John Legend is a R&B performer who released the album 'Once again' in 2006. Since it's release the album has gone platinum and has sold over one million copies.
The musical album 'In The Future" was an album released by Michael Jackson. It was released in 2012 and was a post-humous release since the artist has already passed away.
Eminem's Encore album has sold over 1.5 million copies since its release in 2004. After its release he would not come out with another album until 2009 with Relapse.
Since it's release in 1991 Metallica's Black Album has sold over 16 million records including 125,000 in 2009 alone making it the top selling album since 1990
The Prodigy has been a group since 1990. Their first album, titled "Experience" was released in 1992. It even hit No.12 on the UK Albums Chart in October 1992.
The original (the one from the first PCD album) red head was Carmit Bachar. However since that album she left the group and the red head on the doll domination album cover is a different person!
Martika, an American singer and songwriter released her first album (self titled Martika) in 1988. Since then she has released a great deal of other albums.
Their last proper album was "Minutes to Midnight", but they have since then made the single "New Divide". They are currently working on a new album which they hope to release in early 2010. I cant wait, their so good!
The song 'Jealous Guy' by John Lennon appeared on his Imagine album which came out in 1971. It has been covered by 92 other singers since its release.