It should be fairly easy to compile cURL for Fremantle. I compiled it for Diablo with minimal issues http://www.box.net/os2008/1/38267044/393488254
You may also have luck with the armel package from Debian http://packages.debian.org/lenny/armel/curl/download but of course that is "not recommended" (in my experience either it won't install due to version dependencies or it'll install but segfault or it will just work without issues)

Obviously results may vary.