Whatever you do, you can usually just post the final file as a direct link. Depending on the format, it will download or stream automatically.
What's the file extension? If it's a .mov , you can probably just post it (check the file size to see if it's reasonable.) If it's a .avi, though, you're going to have to compress it, as it's probably huge; too big even for a download.
What's the file extension, and how big is it?
The best compressor is the Windows Media 8 encoder (part of the 7.1 kit.) Quicktime has one too, but it's not freeware and not as good, though it's easier to use.
The Windows Media encoder is a rather complex bit of software, so unless you know someone who uses it, I'll have to give you some very specific pointers. Also, the WME requires some audio in the source file, I don't know why... but if the animation doesn't have any audio, you'll be better off with Quicktime.
Windows Media Encoder
If you wan't to chat for realtime help I'm, 111083857 on ICQ, and GrandAdmThrawn on MSN.