i heard that tableless layout are better than other, that are easily detect by search engines.. http://revelomax.blogspot.com
Tables are for data and not layout Correct web design is done via CSS. If your using tables for layout then you should convert it to using div tags.
I agree with freespace, but to answer your question - Google doesn't penalise tables or reward tableless. Google rewards content.
easily detected by search engine ? not sure about it.. the truth is search engine will easily get your content since in table layout, to reach data it take more kb : <table><tr><td>content... compared with css or tableless : <div> content...
In either way is just fine, just make sure you have clean coding that contents will be easily crawled by SE bots.
From what I have seen Google is not bothered, sites in CSS seems to do well in Yahoo without many backlinks though compared to sites with tables. However CSS designs are more SEO friendly, so use CSS.