We're currently being DDOS'd. We made a few changes and brought the site back online but were attacked again.
We're working on it and will make an announcement when we have more information.
Thanks for your patience while we work this out.
P.S. I'll be at the San Francisco meetup tonight if anyone is going.
Edit: currently back up
a) Being down so often and for so long, no matter what the cause, is a relatively big deal to me as a customer given the dynamics of the market, and I think that it should be taken seriously. Particularly since there is so much fraud associated with Bitcoin.
b) It is more natural for me to follow threads on the 'trading discussions' board rather than the main one. A note saying which one of potentially many threads will be updated was, I felt, appropriate in earlier times.
c) Why the blog, which seems to be hosted by blogspot and not impacted by the DDOS, could not have been updated to mention the current service problems is beyond me. It's probably a more logical place to distribute Tradehill news than a forum owned by a competitor anyway.
d) Whatever the cause (except simply pulling a B7), I would anticipate that the Tradehill staff might be busy and servicing a bunch of individual e-mails to support would be less efficient than having a global status update.
e) I don't use Twitter, but a heads-up there seems like it would be a worthwhile few seconds spent as mentioned by someone else.
f) I would actually be fine being inconvenienced by DDOS from time to time if 1) I knew it was somewhere between possible and likely, and 2) some benefit of the cost savings (vs. using a DDOS protection service or rolling your own solution) was passed on to me as a customer.