I can map and do event work in RMXP(soon VX Ace as well, just bought it and will be playing with it to learn it). Just give me the details on what needs done. Provide tilesets/event-sprites and anything related to help me help you.
-We can discuss map flow, size, and atmosphere and I can make a map suited to your needs.
-Need events done? I can do that. I've created multi-tier events with such things as: conversations with multiple reply choices, weather effects, BGM's, sound effects, sprite changing(i.e. going from standing to lying on the ground or closed chest to open), chests, secrets, and more. Feed me a story-line and a script and I'll go from there.
-Voice acting(depending on if I'm sick or not.): I will do voice overs if needed, just give me my lines.
Most of my knowledge in RMXP is self taught. I've made about 10 projects just playing around, and I made one demo which I rushed through and needs some polish. If you need me contact me via email at slashaar[at]gmail with the subject RMRK Request. I check my email daily. Or just pm me or reply here.
I use google docs to transfer files and documents when working on a project and this allows all members to collaborate. Other methods may include use of skype chat/voice calls or some form of irc.
Word of warning, I do work full time Tuesdays-Saturdays so I may not always be available to put work in on the project, however I can find time to do it before and after work on those days as needed.
I will be awaiting your request.