Computer algebra in R - would that be an idea??

From time to time people request symbolic computations beyond what D() and deriv() etc can provide. A brief look at the internet shows that there are many more or less developed computer algebra packages freely available. Therefore, I wondered if it would be an idea to try to 'integrate' one of these packages in R, which I guess can be done in more or less elegant ways... I do not know any of the computer algebra people around the World, but perhaps some other people from the R-community do and would be able to/interested in establishing such a connection...