Add Multiple Blogs To Drop Down Search Form???

Greetings all,

I have several wordpress blogs and i want to create a search form that has a drop down list of my wordpress blogs to search from. so a visitor would for exmaple, type in “vista” and select ‘computer blog’ from the drop down list of blogs…

they all use the same search/action command (just different url) so i am not sure if there is an easy way to do this.

in addition, i am curious if there is a way to somehow have a “search all” capability, where a blog can search items in another blog on teh same domain.

the google search is kinda crappy so i am trying other methods to display search results for all my blogs as well as having a ‘by site’
search option.

thanks in advance for any help