I started a wet okole group buy about 10 months ago. Your going to have allot of people telling you how they want in on it but when it's time to step up to the plate and commit you'll receive an email telling you they cant afford to do it and to remove their name from the list, PITA to say the least
Rather than create a list at the different Tacoma/Tundra forums you'd be better off asking those interested in joining the forum where the group buy originated and creating an email address that specifically used for the group buy that way your personal email doesn't became inundated with email from the g/b. Also use MS Excel to create your list, it makes it much easier for you to keep track of those interested and the number of rows they want not to mention it helps the Wet Okole rep.
Last but not least Wet Okole are by far the best seat covers I've ever owned definitely worth the investment.