I'm definitely skeptical of any information that comes from Generation rescue or any similar advocacy group. They're highly critical of vaccination in general and proponents of bogus autism treatments like chelation therapy. I wouldn't discount everything they say because of that, but I'd be curious to see what research they're basing their claims on, and who is making the claims. For example, is it someone suing a pharmaceutical company over a vaccine? That's a serious conflict of interest and should raise eyebrows.
Here's some of the research I've been looking at regarding the autism-vaccine link. So far I'm underwhelmed by the idea that I should be fearful of vaccination. None of the epidemiological studies I've looked at can even find an association between the two.
This is a case control study conducted in Poland which found no link between the MMR vaccine and autism, and even found that the vaccine may provide a slight protective effect against autism:
Mrozek-Budzyn D; Kieltyka A; Majewska R Lack of Association Between Measles-Mumps-Rubella Vaccination and Autism in Children: A Case-Control Study. The Pediatric Infectious Disease Journal: 1 December 2009. doi: 10.1097/INF.0b013e3181c40a8a
This one's from England, similar study methodology, also found no association between autism and the MMR vaccine.
Taylor B; Miller E; Farrington CP; Petropoulos MC; Favot-Mayaud I; Li J; Waight PA Autism and measles, mumps, and rubella vaccine: no epidemiological evidence for a causal association. Lancet. 1999;353:2026-9.
Here's another: Thompson et al. N Engl J Med 2007; 357:1281-1292
And another, this one's from Denmark: Madsen et al. Pediatrics Vol. 112 No. 3 September 2003, pp. 604-606
I also found one clinical trial in which the researchers failed to detect any adverse reaction after administering the hepatitis b vaccine to children between four and eight years old.
Diez-Domingo et al. A Randomized, Multicenter, Open-Label Clinical Trial To Assess the Anamnestic Immune Response 4 To 8 Years After A Primary Hepatitis B Vaccination Series The Pediatric Infectious Disease Journal: 18 August 2010. doi: 10.1097/INF.0b013e3181f1b3b6