Upgrade WordPress

Please consider posting a “New Job Request” [1] to have a professional work with you, or consider joining and soliciting professional assistance from the mailing list [2].

[1] http://jobs.wordpress.net/postajob.php or http://www.elance.com/php/search/main/eolsearch.php?matchType=profile#page=1&matchKeywords=wordpress&catFilter=100

[2] http://lists.automattic.com/mailman/listinfo/wp-pro

As for the 404 — that was this suggestion:

After the upgrade is completed, update your permalinks by visiting Administration > Settings > Permalinks and clicking on Save Changes.