https://wordpress.org/extend/plugins/eshop/
Not sure how well it works with buddypress, but I suppose it shouldn’t make any difference. I’m planning on using that plugin myself as well.
Shopify is beyond amazing. I love it so much. Best eCommerce solution hands down. No script or plugin in the world can even come close. Great choice.
The solution would simply be to make two sites that look exactly alike and have them link back and forth to each other… as you are suggesting. There’s no way to have them “live” together though as they are two completely different beasts. Plus Shopify is hosted (no FTP access). Not ideal really since your logins won’t be integrated. Not sure if there’s a solution to that.
If you really need a nice shop plugin, which is easy to use and don’t mind paying for it, go for the shopp wordpress plugin. Used it before and it works great. Heard they started supporting wpmu now as well.
Thanks Millions David, that’s the clarification I needed. I’d love it if Shopify worked; I’ve had the same experience with it being best in class IF all you want/need is a store. Zevo, other suggestions are GREATLY appreciated. I’ll take a look and maybe we keep this thread going to share best practices.
Shopp looks interesting too. It’s no Shopify… but if you need to have a full integrated solution… it could work. Looks much better than WP eCommerce… which I’ve never been a fan of. Personally.
Just to clarify, the ecommerce plugins above all run off the blog portion of the site. 
@xevo – can you point me to where they mention wpmu support for shoppe?
I purchased the plugin a few months back, and got in quite a heated argument with them over wpmu support. It is ‘inferred’ in the forums that wpmu is supported, but when push comes to shove, they say it does not. Basically they told me to kiss their butt when I asked for a refund. I have not been back since.
I have to say that their support and customer service is some of the worst I have ever come across. I would never, ever give them another dime, nor would I ever suggest their product to anyone. Obviously your experience with them was different.
Believe me, it takes a lot to get me going, have to push a ton of buttons, before I get angry over something so petty. They just managed to find all my buttons at once.
That’s odd, cuz the last I was told – from someone using it on MU – was that is was not officially supported, but that it did actually work.
had you tried it and had issues you needed support with?
@Andrea I installed it about a month ago. The problems I had were numerous.
1. Thumbnail generation did not work due to the classic blog.dir/blog-id/ with mu issue.
2. Whenever I would upload images/files/digital downloads/anything I would end up with the red bar with nothing there.
After their absolute disgusting way of dealing with customers, I gave up at that point. (basically told it does not support mu, no refunds, take a hike).
wp-e-commerce on their side support wpmu fully, as you can see with their hosted solution: http://getshopped.com/ … the author told me they were to have a complete new version just after christmas that would answer these needs.
While it does function well, too bad WP eCommerce is poorly coded.
Look at the source, whitespace and lack of comments are terrible.
so, r-a-y, why not sacrifice yourself and code a new shop??… lol
i’m joking, i know that most shops available are just taken from existing tools from somewhere else, ported to WP and that’s it…
i’d be ready to have a go on a complete new concept as well…
“1. Thumbnail generation did not work due to the classic blog.dir/blog-id/ with mu issue.”
That’s pretty much an easy fix at this point, if it’s timthumb.
