I will do the sitemap as it won't hurt, just need to spend some time.

[danieloffice]

But some questions in my mind:
1. If my site is updatd, but I do not update my sitemap, will that delay SE to crawl my new pages?
2. If there are fee tools that can do the sitemap, why the B G just crawling our site automatically?........... isn't that make life easier? So, is that sitemap is already a old fashiion, which I mean in the old days it helps, but as time goes, as technology developed, SE can already doing the same function "by themselves"................... (that may explain why someone just dont' care the sitemap, or it really have no additional advantage.......???)

[Jan]

http://www.google.com/webmasters/sitemaps/ is easy to use :)

I have SEs crawling sites very soon after I upload them, and they don't have site maps. I can't answer if it is more advantageous to one or not. I did create one with google, but that doesn't seem any more crawled than all the sites without one.