Your last statement would be just as valid if I replace homosexuality with religion, all is fair with "pulling unverifiable statements from my ass", isn't it?
Wait, Im confused...
It (replacing your implied "homosexuality" with "religion") just means its one of those things that evolution hasnt dealt with yet.
Clear now?
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You want recent ones? Or studies that have been piled up since 2002?
Kin Selection Hypothesis - Psychological Science, 2010 (most recent one afaik, however, similar research on various species has been done in the past decade)
Gay Sheep Research - Oregon Health & Science University, School of Medicine 2000, 2002, 2004, 2007 as well as affiliated research done elsewhere (or just ask sheep farmers, they are probably the most unbiased since it is their livelihood and that gay rams are causing them problem)
Do Gay have a Choice? - Scientific American Mind, May, 2009
The Evolution of Sex - Scientific American Mind, 2009 (can't remember if it was March of the Penguin or Planet Earth, one of them has references to the gay penguins rearing orphans.... or end up killing them, also many instances in zoos with gay penguins but it does not count as research in my book)
Bonobo Apes - Don't think I need to reference this, do I?
Transsexuals - Biological Psychiatry 2008 (or was it 2007?)
The Third Gender - Scientific American Mind, 2010 (and documentaries of the same name)
Albatross - Taiaroa Head Royal Albatross Centre (New Zealand)
These are the ones I can remember/have on hand atm, in regards to the selfish gene, please look at the paper written in 1980 on it and then try to follow the subsequent papers and studies.
There's almost talk every year about Gender-related issues in Nature, Proceedings of National Academy of Science, Science, Scientific American Mind, etc... look it up at your local library (if it isn't censored out of existent by the fanatic crowd). Read stuff from the International Society for Behavioral Ecology if you can, there's both argument and counterargument for homosexual behaviours. Attend post-secondary biology classes help too (I don't want to list books due to two reasons - not all places uses the same book + reading different books is good to understand current scientific consensus). I haven't include references in other languages since I don't have a translator on hand and the language barrier it imposes. Now, I would like some reputable science paper that proves your claim of "It (Homosexuality) just means its one of those things that evolution hasnt dealt with yet." as well as your various "claims".