Cellphones are not accepted to cause cancer, not even close. There may be some debate, (mostly by the same people that say they have a Wifi allergy) but there is no scientific consensus. Don't take that to mean that the issue is undecided. In science, if there is no evidence for something, it is as likely to exist as pink unicorns.
source:
US Government Summary of Several Studies
A relevant quote:
A pooled analysis of data from Denmark, Finland, Norway, Sweden, and the United Kingdom did not find relationships between the risk of acoustic neuroma and the duration of cellular telephone use, cumulative hours of use, or number of calls;
I think most people's reaction would be the same as Keith and Chemda's even if there were a link to cancer, but there is not.