Here are the logos available for each sponsor. I'll link up each sponsor to their download as soon as it is available. If a sponsor is not listed then they have opted to not have logos appear. All the logo packs contain multiple sizes of the same logo (if possible) to make then easier to place within the map. Note though: some sponsors have multiple logos however you are only required to place one logo per sponsor in the map (you can put more in if you want though); you are welcome to chose whichever logo suits your map the best.
Maverick Servers - download
Sapphire - download
Wacom - download
Massacre Servers - download
Also: please remember to make each of the sponsor logos so that they won't show damage marks and won't be affected by r_picmip.
surfaceparm nomarks //weapon impact won't cause marks on the texture
qer_editorimage textures/yourmap/MaverickServers_1024x512.tga //this is the texture displayed in the texture browser
nopicmip //the texture is not affected by r_picmip
map textures/yourmap/MaverickServers_1024x512.tga //this is the diffuse map you will see ingame
As always let me know if there are any questions, concerns, comments, etc.