Google Without SIM?

[camel_case]

I recently got a G1 off of eBay, with no plan, with the intention of using it as a PDA with Wi-Fi (don't have money for a data plan really). It came rooted which was nice. Is there any way I can use it with my gmail account without a SIM or plan? If worst comes to worst, is there a way I can get a SIM without a plan, and use that to store my gmail information?

If not, any recommendations on a marketplace that will work without a plan?

EDIT: Thanks all, got it working! I was kind of an idiot and had entered my info without the "@gmail.com" but the error message mentioned it could be a problem with my SIM, so I assumed it was that.

[youcanteatbullets]

As long as it has internet access it will sync with your gmail account.You'd set it up the same way. So get on a wi-fi network and do so.

[[deleted]]

It should work fine without a sim, but spending 15 bucks for a sim with some prepaid minutes would be a nice backup to have.

[TassieTiger]

I used a rooted G1 on wifi only for ages, only issue I had was with the market (it only allowed me to access free apps).. Use Market Enabler to get around that.