If you like Italian food, I would recommend Giorgio in Mandalay Place (skybridge between Mandalay Bay and Luxor). It is not Roadfood, but it is reasonably priced (for Vegas) excellent food. You can see menu and prices here:
http://www.pieroselvaggio.com/caffegiorgio/default.asp

A free activity you might enjoy if you like chocolate is Ethyl M Chocolates (a division of Mars) factory tour and cactus garden (with free samples of candy) in Henderson on the way to Hoover Dam:
http://www.ethelm.com/jump.jsp?itemID=117&itemType=CATEGORY

A good website for many restaurants all over Vegas (with their menu):
http://www.usmenuguide.com/lasvegasall.html

Two general Vegas sites to check out, especially for activities and maps (but you probably can get cheaper tickets from other places):

Vegas.com: (detailed maps including monorail and tram map, vast listing of activities and shows):
http://www.vegas.com/map.html

Las Vegas Advisor (activities, maps, shows, with some ratings):
http://www.lasvegasadvisor.com/?CFID=4304009&CFTOKEN=29017534