We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:
https://discuss.afni.nimh.nih.gov
Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.
The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.
I've no experience with Altivec acceleration, so don't know how much it would improve the speed of AFNI. If it isn't too costly, and the compiler is supposed to paralleize "for free" (without compiler directives), it would be worth a shot.
I hope you use a "mask" with 3dDeconvolve to speed it up - that can help a lot. Program 3dAutomask can generate a mask file for you, from an EPI dataset.