On a default install, even if you know to switch to the /spell handler, you won't get spelling suggestions.
Add spellcheck to default /select handler
Velocity templates not rendering spellcheck suggestions correctly
Patch to tweak solrconfig.xml to produce some suggestions. This is perhaps imperfect, given text_general's processing, but at least it produces some results. The type textSpell is no longer in schema.xml (not sure if/when it ever was)
I've also submitted SOLR-4681 which includes what's in the patch, plus it adds it to the default /select launch.
SOLR-4681 is a superset of SOLR-4680
Committed this to both 4x (r1467413) and trunk (r1467416).
Closed after release.