Subdomain vs. new domain

Is there a disadvantage to using a subdomain

[steveweber123]

I have a domain hosted with a general name. I have several subdomains off of it selling different products which are doing quite well. I am getting ready to add another product totally different which needs its own site.

Using a subdomain will be the esiest by far. The name will go well with my general root name and I can use the same host and shopping cart setup.

My question is this: In the long run, is there really any disadvantage to going the subdomain route I haven't thought about? (Besides perhaps name recognition...www.widgets.com vs www.widgets.name.com. But I could not get widgets.com anyway. It would have to be something like ourwidgets.com, etc.)

So before I get started on the new site, should I just stick with the subdomain I can set up? Or should I register a new name and host it on its own and just plan to point the order page back to my current shopping cart?

Thank you

[Webwork]

How about the old "don't put all your ecommerce eggs in one domain basket" argument against expanding using a single domain?

[Bitochon]

On the other hand...Isn't it better since engines will spider just one site? Why put a new site through the whole SEO process again?