I have used the short ad below in places like http://www.twitter.com/ and http://www.betternetworker.com/ (for FREE) and it brings me new Sqip sign ups every time I run it. It has helped me sign up 272 people "personally" in my first month.
Did YOU get your 100 FREE Shares of "SQIP" yet? (my Sqip referral link here) (Limited-Time)
Personally, my link sends them to my marketing page (here's a marketing page I made for you to use for free http://www.sqippcom.info/ - It presents the SQIP biz opp and directs the prospect back to you to join up or to answer their questions), or directly to the Sqip website. (Make sure they have your contact info and Sqipcom referrer link)
P.S. I have also used a longer email but it seems the shorter ones work pretty well.