Are ya'll planning to redirect the old links to the new ones Such as:
www.abcbodybuilding.com/forum/showthreaded.php?Number=1115841 got changed to http://www.abcbodybuilding.com/forum...ad.php?t=69258 without being automatically forwarded to the new location.
Its important both for usability reasons and for search engine rankings. Ya'll used to rank first for the term "p90x" using google search , now ABC is atleast 10 links deep (and will probably get worse as time passes) and just links to the "we've moved page". Whoever is doing your web development should look into 301 redirects and the SEO reasons to perform them or ask on the Vbulletin forum.