Seeker95 said:I wouldn't be so confident that the 3.5 OGL will allow anyone to continue publishing 3.5 material after 4e comes out. The license is granted by WotC. It can be revoked. Or, more likely, updated to 4e material requirements instead.
The Open Gaming License is perpetual...
OGL said:In consideration for agreeing to use this License, the Contributors grant You a perpetual, worldwide, royalty-free, non-exclusive license with the exact terms of this License to Use, the Open Game Content.
In other words, anything that has already been declared Open Game Content (like the contents of the 3.5 SRD) is and always will be available for use by anyone who wants to. The rights to use it cannot be revoked or changed.