The nasal spray vaccine isn't a new thing - it's been used with the seasonal flu vaccine for a few years, at least. It generally has less preservatives - but is also less effective.
Also the H1N1 strain of the flu is not a new strain - it's just a mutation of a previously known strain, which is what every seasonal flu is. It is exactly the same as any other seasonal flu, in terms of it's basic make up - that's why the same technology could be used to make the vaccine. If it was a completely new thing, the same technology would be ineffective.
One good and bad thing about the swine flu vaccine is that it has been much more closely monitored than the seasonal flu vaccine. That's good because in some ways, it makes it even safer. But it's also bad because every single reaction is noted and reported - so the statistics are slightly higher than those of the seasonal flu vaccine - however this is most likely because it IS monitored more closely, not because there ARE more reactions.
If it's preservatives that someone is worried about, there are pretty much the same preservatives in a bunch of other vaccines as well - and all of them have years of study, some are even found naturally in our bodies - but still there is a lot of unproven claims about them. The research indicates that they are safe, otherwise they wouldn't be using them in the first place.
I know that ultimately we make up our own minds - but as a medicinal chem major, with a lot of study into it, I believe that the vaccine is as safe as any other vaccine and a lot of the hype around it is just that - hype. I understand that some people are anti-vaccination in general and therefore of course they are going to be anti-swine flu vaccine too. But those people who aren't anti-vaccination, I think it's a shame that this vaccine has been misrepresented by many because there's (in my opinion) absolutely nothing that makes this vaccine any different from any other vaccine out there. If anything, all the close monitoring, all the recalls etc makes it MORE safe!! Other vaccines don't get that kind of special treatment