I don't think they are particularly talented either. But I can't deny I like both 'All The Things She Said' and 'Not Gonna Get Us', though I don't like whichever one of them does the shrieking of the title line to that song.
For want of another example I like 'Sound Of The Underground' by Girls Aloud, I think the production on that track is excellent. The fact that the 5 girls have little or no talent between them doesn't stop it being a damn good pop song. Because whoever produced certainly does have talent.
Back to t.A.T.u though, I agree with Rosie in that whether they are lesbian or not, they shouldn't use it to sell their records.