The SX150 designation would make sense if Canon is following the same path with the SX1xx as with the SX2xx, where the SX220 is apparently a version without GPS not sold in the US so that for US consumers the series designation appears to skip from SX210 to SX230.
Any thoughts on why the SX150 would not have a 14X zoom -- the SX1xx series had seemed to follow the SX2xx lens changes (after, of course, the SX2xx series was introduced.)