Cloaking - showing the end users and
search engine spiders different content (usually used to enhance listings.
frequently used as spamming technique)
Cloaking is allowable for flash content as long as it
is content specific on a trusted feed, but if you are generally cloaking
just to fool search engines that is considered spam. Leading competitors
may sometimes compare the cached results with current results and turn
in spam. If these are extremely different then your site may get flagged
for cloaking and delisted.