While I can understand the initial concern that BorderGirl expressed about these pics (yes, I can now see them too), I don't think they are anything to worry about.
Helena evidently is in some turmoil over the fate of her friend possibly "lost" in Thailand from the tsunami and she is looking for reassurance from her friend, Bono.
Remember, Helena and Bono and Ali went through a lot together after the loss of Michael Hutchene and so they are like an extended family.
While Helena does appear a little too enthusiastic next to Bono, Bono is clearly responding to her in his mannerisms and in his looks as a concerned and loyal friend - nothing more.
I particularly love the fourth pic of them together - Bono is looking very regal.