Blarg! I literally just started using this library 12 hours ago for my research work at my university. Now I feel I need to remove it ASAP since its own creator doesn't use it and recommends using something else.
We've been using ASIHttpRequest for a few years now without issue. If the code's in place already just launch! It's rock solid for what we use it for.
If you've yet to fully integrate it then it may be worth switching but none of the one's linked seem as full featured and simple to use as ASIHttpRequest.
It's a sad day and hopefully someone else will take over the reigns.