Thanks to Dean over at voipuser.org, along with Martyn Davies who did some great testing, we now have a comment line to which you can connect via SIP. All you need to do is use your SIP phone to call the address:
(Please note that this is NOT an email address, but rather a SIP address.) Martyn and Dean have both left messages and it seems to work well.
If you have a SIP phone with the ability to call across the Internet, please do give it a try and leave us a message. Feedback is definitely welcome. Again, many thanks to Dean for setting this up and to Martyn for helping with testing.
P.S. As a bonus, we also now have a PSTN comment line in the UK: +44 844 933 6305. If you want to give that number a try, please do!