I've been having silver nitrate applied to them by a chiropodist. It seems as effective as anything else so far...
Edit (March 2009): to my great surprise, this post appears to have turned into a self-help group for long-term verruca sufferers. Which is fine: I know how awful having verrucas can be. Even if it is a little worrying that my greatest contribution to world culture may turn out to be a venue for foot-inspired desperation...
Anyway, a couple of rules I'd like to ask you to respect:
1) It's not a forum, it's a comment thread on my personal photo blog. Pedantic point, maybe, but I'm a pedantic kind of guy.
2) On similar lines, could you please make an effort to spell and punctuate your comments correctly? Thanks.
3) Don't try the vinegar and duct tape method and then come back a couple of days later whinging about how much it hurts. You knew it would hurt when you tried it, everyone before you said how much it hurt, if you chose not to heed those warnings it's your own fault.
4) If you're trying salicylic acid (bazuka), it's important to do it right, which is not helped by the extremely unclear instructions on the tube. Peel off the dried-on layer before reapplying, and trim away excess skin with a (sharp!) corn knife once a week or so. Keep going, as it may take several tubes to kill all the little buggers. This worked for me, but YMMV. Persistence and consistency are key, as with all verruca treatments.
5) Homeopathy is, I'm afraid, totally unsupported by any evidence: all scientific studies that have been done show that it is no better than placebo (which, BTW, is surprisingly good). See badscience.net
for more information on this.
6) Whatever treatment you eventually find works for you, the first step to success appears to be accepting that there is no free lunch, and that it's going to take time, a certain amount of pain, and grim determination.
It is possible to get rid of them: my "after" picture is here
[The silver nitrate was pish, by the way.]