Hello Juli,
I am also a May 2008 bride and I signed up with sattine during their showcase at Holiday Inn in april this yr. Managed to get a rather gd package that includes MTM for either WG or EG at $3399. U can PM me if you want more details on my package but I understand from others who have tried to bargain, that similar perks cannot be obtained outside of the showcase.
BTW, sattine is better known for their photography and friendly services than for their gowns coz it's a fairly new boutique. Which means yeah, they're not cocky, not pushy etc but that also means that they dont carry many gowns.
If you're fussy about gowns, then better that you shop ard several BS til you find one with gowns that you fancy. Otherwise, opt for a package that included MTM with a BS like sattine. Safest bet.