Hiring someone to bookmark a number of the URLs provided using SocialMarker [url removed, login to view] (SocialMarker is a great tool that makes posting a single URL across multiple bookmarking sites simple - it is still done by hand, but process is largely automated)
Lowest Bid per URL (submitted to 49 sites) will get the job.
Also mention the cost of setting up accounts on all these 49 sites.
Mention all the details of your bid in PMB. Bids without a message will be deleted.