First off, things I am in love with:
-HTML5 -> great way to show you guys know your stuff!
-jquery = <33333
-i use lynx on a daily basis. glad you support it 
next, fix/think about these things:
-your home page title => this is what gets bookmarked, and what people see. It is somewhat redundant.
-css link color - change it so you dont have purple links for the :visited. It just kinda bothers me...
-the font family you are using (firebug was giving me some weird readings) renders your team number kinda weirdly... I would suggest another type
-this is a note, im not testing this but: make sure all the HTML5 things work with older browsers (or do the cop out i did and give an IE6 warning)
-the bottom part of each page should be cleaned up a tad... I would rather see it all fancy center like (and i would switch out summer 2010 to a copyright personally. Thats an opinion though)
-what others said: EXTERNAL LINKS IN NEW PAGE. you could use "
$("a[@href^='http']").attr('target','_blank');" but i noticed your top menu uses http links rather than relative links.
-disability validation - whats missing => title and alt on every image.
-when you have links on the menu that lead to blank pages, I would get rid of them until content is there. Never know when a sponsor will look at your site 
-make the css class "dateline" something that doesnt look like links... kinda misleading
-change the validation link on the website page to an actual validation of your website, so they can view in awe your awesomeness.
i must say something here now. I evaluated about 25 websites last year, and a lot had a problem you don't. You wrote original information on FIRST AND CITED IT CORRECTLY <- LOVE THIS!
..... but then i see your FRC logo on the FIRST page, and I think it might violate FIRST image rules D:
-lastly, i feel like if you put the logos of your sponsors on the sponsors page they would be happier. Another pure opinion.
But otherwise, add more content, and you shall be all ready to go!!
Ryan