What's going on with all the spiders?

I launched a site on Monday and so far 1786 spiders have visited
my site. Granted, I built up the site first and launched it with 30
or so pages on it - but it seems nearly 2000 spiders in a week is
a bit much, right? 298 spiders visited the site yesterday.

I'm not sure if I should enjoyed being crawled all over by spiders
or take out a can of Raid and somehow blast these suckers away.

I only mention the above because my other websites are not hit
by spiders this much - not even close. I don't know if I should
be happy or concerned by all this activity.

Thoughts???