A writer for Yahoo! TV could get his fair share of flak for choosing a variant spelling of a word and for making up a word, even if he oozes a sort of earnestness:
Was this written by a sometime writer for Yahoo! TV?
If Courtney Love is an occasional actress, she’s a sometime thespian. She acts sometimes. The similar words are really different parts of speech: Sometimes is always an adverb; sometime is an adjective or adverb. So, if you’re modifying a noun, use sometime.