I see Colledge as a backup to both G positions assuming Spitz beats him out for the starting LG job.
Clifton, Tauscher, Wells, Sitton, Bulaga, Spitz, and Lang are probably all good bets to make the final roster based on past performance, draft position, and starting experience. That probably leaves Colledge, Newhouse, Dietrich-Smith, Barbre, and Giacomini battling for two and maybe three more offensive line spots on the final 53-man roster.