I know the SSD in the base MBP is removable, but are there any replacement/upgrade SSD options yet that fit this? I grabbed one at 256 but I really want to make the jump to 500 soon. It fills up too fast.
Exactly what computer do you have, and what SSD did you buy? Apple doesn't sell any portable now that uses a standard 2.5" SSD so you may not be able to upgrade as easily as you think.
Yes, I corrected myself. That new SSD is completely proprietary, so you're not likely to find any options for some time, if at all. Even with the earlier models which do have some upgrade options available, the 3rd party options are all quite a bit slower than Apple's storage. If you're already in a space crunch, you'll be better off returning this computer if at all possible.